Quantum coherence and entanglement partitions for two driven quantum dots inside a coherent micro cavity
Publication date: Available online 27 August 2019Source: Physics Letters AAuthor(s): A.-B.A. Mohamed, H. Eleuch, C.H. Raymond OoiAbstractWe explore the coherence and entanglement of two separated quantum dots placed in an open microcavity. The generated entanglement and coherence depend crucially on the two-exciton decay and the initial coherence intensity. The phenomena of sudden death and sudden birth entanglement are observed. (Source: Physics Letters A)
Source: Physics Letters A - August 28, 2019 Category: Physics Source Type: research

Prediction of a new direct-gap silicon phase: T36 silicon
Publication date: Available online 26 August 2019Source: Physics Letters AAuthor(s): Chun-Xiang Zhao, Yang Huang, Jia-Qi Wang, Chun-Yao Niu, Yu JiaAbstractElemental silicon plays an extremely important role in technologically relevant fields. Owing to its abundance, silicon is the preferred solar-cell materials in spite of the fact that many silicon allotropes have indirect band gaps. Looking for silicon materials with direct band gap is still a significant field in material science. Here, we propose a new silicon allotrope possessing a tetragonal cell with 36 silicon atoms (termed as T36 silicon), which displays P42nmc sy...
Source: Physics Letters A - August 28, 2019 Category: Physics Source Type: research

NaB6Si: A novel wide band gap semiconductor with great hardness
This study provides a fundamental understanding of the structural, mechanical, and electronic properties in NaB6Si. (Source: Physics Letters A)
Source: Physics Letters A - August 25, 2019 Category: Physics Source Type: research

Three-dimensional static analysis of multilayered one-dimensional orthorhombic quasicrystal spherical shells with the piezoelectric effect
Publication date: Available online 23 August 2019Source: Physics Letters AAuthor(s): Yunzhi Huang, Yang Li, Liangliang Zhang, Han Zhang, Yang GaoAbstractThe static analysis of multilayered one-dimensional orthorhombic piezoelectric quasicrystals spherical shells is presented by using the state vector method. Based on two separated state equations, the solution of a homogenous spherical shell is derived, and the solution for the corresponding multilayered case is obtained via the propagator matrix method. Mechanical behaviors of spherical shells subjected to two kinds of symmetric loads are analyzed, respectively. Under uni...
Source: Physics Letters A - August 25, 2019 Category: Physics Source Type: research

Editors
Publication date: 22 September 2019Source: Physics Letters A, Volume 383, Issue 27Author(s): (Source: Physics Letters A)
Source: Physics Letters A - August 23, 2019 Category: Physics Source Type: research

Localization of optical pulses in guided wave structures with only fourth order dispersion
Publication date: Available online 19 August 2019Source: Physics Letters AAuthor(s): Wesley B. CardosoAbstractInspired by the recent realization of pure-quartic solitons [Nat. Commun. 7 (2016) 10427], in the present work we study the localization of optical pulses in a similar system, i.e., a silicon photonic crystal air-suspended structure with a hexagonal lattice. The propagation of ultrashort pulses in such a system is well described by a generalized nonlinear Schrödinger (NLS) equation, which in certain conditions works with near-zero group-velocity dispersion and third order dispersion. In this case, the NLS equa...
Source: Physics Letters A - August 20, 2019 Category: Physics Source Type: research

Editors
Publication date: 12 September 2019Source: Physics Letters A, Volume 383, Issue 26Author(s): (Source: Physics Letters A)
Source: Physics Letters A - August 20, 2019 Category: Physics Source Type: research

Introducing article numbering to Physics Letters A
Publication date: 12 September 2019Source: Physics Letters A, Volume 383, Issue 26Author(s): Thomas Thayer (Source: Physics Letters A)
Source: Physics Letters A - August 20, 2019 Category: Physics Source Type: research

Quantum diffraction of position-momentum entangled photons from a sharp edge
Publication date: Available online 16 August 2019Source: Physics Letters AAuthor(s): Samridhi Gambhir, Mandip SinghAbstractIn this paper, an experiment of quantum diffraction of position-momentum entangled photons from a straight sharp edge is presented. Path of a single photon of an entangled pair is partially blocked by a sharp edge whereas the other photon is detected at a stationary location without revealing the which-path information of the other photon. Quantum diffraction pattern of the sharp edge is revealed only in the correlated conditional detection of spatially separated photons. Theoretical analysis of the qu...
Source: Physics Letters A - August 17, 2019 Category: Physics Source Type: research

Broad range frequency – temperature response of Ba2Zn2Fe12O22
Publication date: Available online 14 August 2019Source: Physics Letters AAuthor(s): Bibhuti B. Sahu, S.K. Patri, Banarji BeheraAbstractBa2Zn2Fe12O22 was synthesized by solid state reaction technique. The strongly temperature and frequency dependent electrical properties and complex impedance spectroscopy were analysed. Complex modulus formalism shows the existence of high resistance and small capacitance of the materials for the short range relaxation. The presence of non-Debye type relaxation is revealed from Nyquist plots and enabled to separate the contribution from bulk and grain boundary effect in the material. Furth...
Source: Physics Letters A - August 15, 2019 Category: Physics Source Type: research

Modified KdV equation for magnetized Rossby waves in a zonal flow of the ionospheric E-layer
Publication date: Available online 14 August 2019Source: Physics Letters AAuthor(s): T. Kaladze, L. Tsamalashvili, D. Kaladze, O. Özcan, A. Yesil, M. IncAbstractNonlinear interaction of magnetized Rossby waves with sheared zonal flow in the Earth's ionospheric E-layer is investigated. It is shown that in case of weak nonlinearity 2D Charney vorticity equation can be reduced to the one-dimensional modified KdV equation. (Source: Physics Letters A)
Source: Physics Letters A - August 15, 2019 Category: Physics Source Type: research

Effect of magnetic field on a multi window ladder type electromagnetically induced transparency with 87Rb atoms in vapour cell
We report the observation of nine such windows. Such multi window EIT systems are capable of storing pulses at the different frequencies, corresponding to these windows hence paving the way for realization of multi frequency quantum memories. Also, the total bandwidth of storage is 218.4 MHz which is two orders of magnitude higher than that typically obtained in single window EIT based storage systems. These systems have tremendous applications in the field of speedy transmission of data over a long distance quantum communication channel. (Source: Physics Letters A)
Source: Physics Letters A - August 14, 2019 Category: Physics Source Type: research

Influence of the long-range forces in non-Gaussian random-packing dynamics
Publication date: Available online 13 August 2019Source: Physics Letters AAuthor(s): Carlos Handrey Araujo FerrazAbstractIn this paper, we perform molecular dynamics (MD) simulations to study the random packing of spheres with different particle size distributions. In particular, we deal with non-Gaussian distributions by means of the Lévy distributions. The initial positions as well as the radii of five thousand non-overlapping particles are assigned inside a confining rectangular box. After that, the system is allowed to settle under gravity towards the bottom of the box. Both the translational and rotational move...
Source: Physics Letters A - August 14, 2019 Category: Physics Source Type: research

Magnon spin Nernst effect on the antiferromagnetic checkerboard lattice
Publication date: Available online 13 August 2019Source: Physics Letters AAuthor(s): A.S.T. PiresAbstractIn this paper we study topological effects in an anisotropic checkerboard antiferromagnetic lattice in the presence of the Dzyaloshinskii- Moriya interaction (DMI). The time reversal symmetry is broken by anisotropies in the Hamiltonian. However, in contrast to the honeycomb lattice, the DMI does not open a gap here. We calculate the energy spectrum of the magnons and the spin Nernst coefficient in the presence of a longitudinal temperature gradient. (Source: Physics Letters A)
Source: Physics Letters A - August 14, 2019 Category: Physics Source Type: research

Evolution processes of coupled thermal qubits
Publication date: Available online 9 August 2019Source: Physics Letters AAuthor(s): Theerawat Chatchawaltheerat, Supitch Khemmani, Julian PoulterAbstractWe investigate the quantum speed limit time (QSLT) of quantum evolution before thermal equilibrium of two coupled qubits each of which is coupled to a separate thermal bath at the same temperature within the Born-Markov approximation. The evolution process in one particular initial state can change between speed-up and speed-down two times before reaching equilibrium. We call this double cusp behaviour. This behaviour is an anomalous phenomenon in evolution processes in th...
Source: Physics Letters A - August 10, 2019 Category: Physics Source Type: research

First-principles study of metal-semiconductor contact between MX2 (M = Nb, Pt; X = S, Se) monolayers
Publication date: Available online 9 August 2019Source: Physics Letters AAuthor(s): Akmal Khan, H.U. Din, M. Idrees, Fawad Khan, Tahani A. Alrebdi, Chuong V. Nguyen, M. Shafiq, B. AminAbstractFirst principles calculations are performed to investigate the structural and electronic properties of MX2 (M = Nb, Pt; X = S, Se) monolayers and their van der Waals (vdW) heterostructures. The dynamical stability of monolayers and vdW heterostructures is confirmed by binding energy and phonon spectra. An indirect band gap nature is found for PtS2 and PtSe2 monolayers while NbS2, NbSe2 and all vdW heterostructures are metals. ...
Source: Physics Letters A - August 10, 2019 Category: Physics Source Type: research

Determining local inhomogeneities of rotating plasma density via microwave refraction
Publication date: Available online 8 August 2019Source: Physics Letters AAuthor(s): Yu.V. Kovtun, Y.V. SiuskoAbstractA method for determining local inhomogeneities of the rotating plasmas is proposed. This method is based on spectral and correlation analysis of the reflected signals from the plasma at normal and oblique microwave incidence. Experimental approbation of the method is made. (Source: Physics Letters A)
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Induction of an atomically thin ferromagnetic semiconductor in 1T′ phase ReS2 by doping with transition metals
Publication date: Available online 8 August 2019Source: Physics Letters AAuthor(s): Jing Pan, Xiaoyu Zhou, Jiansheng Zhong, Jingguo HuAbstractTwo-dimensional 1T′ phase ReS2, a transition metal dichalcogenide, has a unique structure and electronic properties that are independent of thickness. The pure phase is a nonmagnetic semiconductor. Using density functional theory calculations, we show that ReS2 can be tuned to a magnetic semiconductor by doping with transition metal atoms. The magnetism mainly comes from the dopant transition metal and neighboring Re and S atoms as a result of competition between exchange split...
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Power threshold and confinement in discharges achieving high-βN H-mode phases on EAST tokamak
Publication date: Available online 8 August 2019Source: Physics Letters AAuthor(s): Yanjun Liu, Zixi Liu, Xiang Gao, Tao Zhang, Yao Yang, Hong Li, Jinlin Xie, Adi Liu, Tao Lan, Chu Zhou, Wenzhe Mao, Weixing Ding, Ge Zhuang, Wandong Liu, EAST TeamAbstractA series of discharges achieving high-βN(>1.5) H-mode phases were obtained on EAST with both LHW and NBI as the heating power, a tungsten divertor, an unfavorable ▽B×B direction configuration for the L-H transition and a lower toroidal field (BT∼1.6T). The experimental power threshold with the unfavorable direction configuration appeared to be higher tha...
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Resonant light absorption and plasmon tunability of lateral triangular Au nanoprisms array
Publication date: Available online 8 August 2019Source: Physics Letters AAuthor(s): Mengyao Gao, Xuanli Zheng, Imran Khan, Haoyuan Cai, Jinshen Lan, Jing Liu, Jiayuan Wang, Jianyang Wu, Shengli Huang, Shuping Li, Junyong KangAbstractOptical characteristics and electric field distribution of triangular Au nanoprism in a unit and units array under polarized light irradiation were systematically studied by numerical simulation with finite difference time domain method. It is found that the plasmonic properties of the triangular nanoprism are dominated by the electric polarization rather than the wave propagation. The triangul...
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Electronic properties of the Dirac and Weyl systems with first- and higher-order dispersion in non-Fermi-liquid picture
Publication date: Available online 7 August 2019Source: Physics Letters AAuthor(s): Chen-Huan WuAbstractWe investigate the non-Fermi-liquid behaviors of the 2D and 3D Dirac/Weyl systems with low-order and higher order dispersion. The self-energy correction, symmetry, free energy, optical conductivity, density of states, and spectral function are studied. We found that, for Dirac/Weyl systems with higher order dispersion, the non-Fermi-liquid features remain even at finite chemical potential, and they are distinct from the ones in Fermi-liquid picture and the conventional non-Fermi-liquid picture. The power law dependence o...
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Peculiarities of melting and crystallization of n-decane in a porous glass
Publication date: Available online 7 August 2019Source: Physics Letters AAuthor(s): A.L. Pirozerski, O.I. Smirnova, A.I. Nedbai, O.L. Pirozerskaya, N.A. Grunina, V.M. MikushevAbstractMelting and crystallization of n-decane embedded into porous glass with the mean pore size of about 6.4 nm were studied using acoustic and DSC methods. Smearing of the phase transitions, decrease of melting and freezing temperatures, pronounced hysteresis between melting and crystallization were revealed by both methods. In DSC measurements for the pore filling factors 70% and higher double peaks were observed upon cooling while only single pe...
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Microstructure and magnetic properties of NdFeB alloys by co-doping alnico elements
Publication date: Available online 7 August 2019Source: Physics Letters AAuthor(s): Sajjad Ur Rehman, Qingzheng Jiang, Lunke He, Houdong Xiong, Kai Liu, Lei Wang, Munan Yang, Zhenchen ZhongAbstractElements of alnico 8 are added into Nd-Fe-B alloys fabricated by rapid solidification method. It is observed that the magnetic properties at high temperature improved by small addition of alnico elements. The Curie temperature of the alloys increased from 580 K for standard alloy to 639 K by 20 % addition of alnico 8 elements. The spin reorientation temperature decreased from 133 K to 104 K. The TEM analysis showed that elements ...
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Deconvolution of 3-D Gaussian kernels
Publication date: Available online 7 August 2019Source: Physics Letters AAuthor(s): Z.K. SilagadzeAbstractUlmer and Kaissl formulas for the deconvolution of one-dimensional Gaussian kernels are generalized to the three-dimensional case. The generalization is based on the use of the scalar version of the Grad's multivariate Hermite polynomials which can be expressed through ordinary Hermite polynomials. (Source: Physics Letters A)
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Understanding the conduction and switching mechanism of Ti/AlOx/TaOx/Pt analog memristor
Publication date: Available online 7 August 2019Source: Physics Letters AAuthor(s): Sen Liu, Yi Sun, Bing Song, Zhiwei Li, Haijun Liu, Qingjiang LiAbstractIn this letter, the conduction and bipolar switching mechanism of the ultrathin AlOx(3 nm)/TaOx(5 nm) memristor are investigated through the electrical characterization and elemental analysis. The AlOx/TaOx memristor exhibits high uniformity and excellent analog property after initial reset process. The following experiments and analyses demonstrate that the switching behavior could take place over the whole area of TaOx/Pt interface and is dominated by the tunneling bar...
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Estimation of decoherence in electromechanical circuits
Publication date: Available online 7 August 2019Source: Physics Letters AAuthor(s): Olímpio P. de Sá Neto, Helder A.S. CostaAbstractThis letter presents a schematic circuit with capacitive coupling between the CPW Cavity Center Trace (resonated with electromagnetic mode) and the mechanical Nanoresonator mediated by Transmon, resulting in the Cross-Kerr electromechanical effect. Then we show the dynamics of quantum states, showing the generation of superposition states and bipartite entanglement of continuous variables through nonlinear quantum electrodynamics in the circuit. Finally, we calculated and estimat...
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

The mechanical flexibility, electronic structure and carrier mobility of monolayer GeP: A first principles study
Publication date: Available online 7 August 2019Source: Physics Letters AAuthor(s): Jie Sun, Jiancai LengAbstractInspired by successful exfoliation in experiment, we explore mechanical, electronic and transport properties of GeP monolayer using first-principles calculations. It is found that the cleavage energy of GeP monolayer is ∼0.39 J/m2, verifying it can be feasibly extracted from its bulk form. The calculated stress-strain relation reveals that monolayer GeP can withstand a tensile stress and strain up to 14.88 GPa and 28%, respectively. The band structure calculations indicate the monolayer GeP possesses an indi...
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Some remarks on dual helicity flag-dipole spinors
In this report we advance into a mapping procedure transmuting a single helicity spinor into a dual helicity spinor. Such a mathematical mechanism reveal us a class of spinor which fits into fourth class within Lounesto classification [1]. The focus of the present manuscript is to expose the algebraic construction of flag-dipole spinors and briefly explore its underlying physical and mathematical contents. (Source: Physics Letters A)
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Editors
Publication date: 2 September 2019Source: Physics Letters A, Volume 383, Issue 25Author(s): (Source: Physics Letters A)
Source: Physics Letters A - August 9, 2019 Category: Physics Source Type: research

Group chase and escape with prey's anti-attack behavior
Publication date: Available online 6 August 2019Source: Physics Letters AAuthor(s): Shuai Zhang, Mingyong Liu, Xiaokang Lei, Panpan Yang, Yunke Huang, Ruaridh ClarkAbstractGroup chase and escape is widely observed in nature, where the predators approach the prey and the prey try to escape. An interesting phenomenon occurs when a prey group is under attack, whereby some individuals perform anti-attack behavior that places themselves at a greater risks of being caught. It remains unclear why certain prey would risk their survival and what conditions and internal mechanisms trigger this anti-attack response. Using a set of lo...
Source: Physics Letters A - August 7, 2019 Category: Physics Source Type: research

A first-principles insight into Pd-doped MoSe2 monolayer: A toxic gas scavenger
Publication date: Available online 6 August 2019Source: Physics Letters AAuthor(s): Shouxiao Ma, Liancun Su, Li Jin, Jinsheng Su, Ying JinAbstractUsing first-principles theory, we investigate the Pd-doping effect on the geometric and electronic behaviors of MoSe2 monolayer, and the adsorption behavior of Pd-MoSe2 monolayer upon four toxic gases, namely NO, NO2 SO2 and H2S. Desorption property of Pd-MoSe2 monolayer upon four gases at diverse temperatures is analyzed as well to help explore its potential application. For Pd dopant adsorption onto MoSe2 monolayer, somewhat n-type doping is determined, which accounts for the i...
Source: Physics Letters A - August 7, 2019 Category: Physics Source Type: research

A time-series approach to measuring node similarity in networks and its application to community detection
Publication date: Available online 6 August 2019Source: Physics Letters AAuthor(s): Bo Yang, Tao Huang, Xu LiAbstractA central concept in network analysis is that of similarity between nodes. In this paper, we introduce a dynamic time-series approach to quantifying the similarity between nodes in networks. The problem of measuring node similarity is exquisitely embedded into the framework of time series for state evolution of nodes. We develop a deterministic parameter-free diffusion model to drive the dynamic evolution of node states, and produce a unique time series for each source node. Then we introduce a measure quant...
Source: Physics Letters A - August 7, 2019 Category: Physics Source Type: research

Magnetic quantum ring in two-dimensional topological insulators
Publication date: Available online 5 August 2019Source: Physics Letters AAuthor(s): Guo Li, Ning Yang, Weidong Chu, Haifeng Song, Jia-Lin ZhuAbstractThe quantum properties of topological insulator magnetic quantum rings formed by inhomogeneous magnetic fields are investigated using a series expansion method for the modified Dirac equation. Cycloid-like and snake-like magnetic edge states are respectively found in the bulk gap for the normal and inverted magnetic field profiles. The energy spectra, current densities and classical trajectories of the magnetic edge states are discussed in detail. The bulk band inversion is fo...
Source: Physics Letters A - August 6, 2019 Category: Physics Source Type: research

Tuning the electronic and magnetic properties of zigzag silicene nanoribbons by 585 defects
Publication date: Available online 5 August 2019Source: Physics Letters AAuthor(s): Haixia Dong, Dangqi Fang, Baihua Gong, Yang Zhang, Erhu Zhang, Shengli ZhangAbstractUsing first-principles calculations, we study the geometric structures, formation energies, electronic and magnetic properties of zigzag silicene nanoribbons (ZSiNRs) with 585 defects. There are two kinds of 585 defects in ZSiNRs referred as 585-Iand 585-II, respectively. It is found that no matter which one of the two types, it is the most stable at the edge of the ZSiNR, and at this time it is even more stable than that in an infinite silicene sheet. Utili...
Source: Physics Letters A - August 6, 2019 Category: Physics Source Type: research

Surface electromagnetic waves at the interface between dissipative porous nanocomposite and hypercrystal under different temperatures
Publication date: Available online 5 August 2019Source: Physics Letters AAuthor(s): I. FedorinAbstractIn the current paper the properties of surface plasmon polaritons as well as hybrid polarized surface electromagnetic waves at the plane interface of a porous semiconductor nanomaterial and a hypercrystal are studied theoretically and numerically. The nanomaterial, as well as the hypercrystal, is made of n-type doped indium antimonide (n-InSb) semiconductor layers. The losses which inherent to the semiconductor materials are taken into account. To describe the properties of the constituent semiconductor layers the approxim...
Source: Physics Letters A - August 6, 2019 Category: Physics Source Type: research

Thermoelectric performance of monolayer Bi2Te2Se of ultra low lattice thermal conductivity
Publication date: Available online 5 August 2019Source: Physics Letters AAuthor(s): Bin Xu, Liangong Song, Gaohui Peng, Jing Zhang, Shanshan Ma, Yusheng Wang, Yuanxu WangAbstractThe electronic structure and thermoelectric properties of monolayer Bi2Te2Se were studied by density functional theory and semi-classical Boltzmann transport equation. The band gap with TB-mBJ can be improved for monolayer Bi2Te2Se. Monolayer Bi2Te2Se have ultra-low thermal conductivity comparing with other well-known two-dimensional materials. The monolayer Bi2Te2Se can improve electrical conductivities. ZT increases with increasing temperature fo...
Source: Physics Letters A - August 6, 2019 Category: Physics Source Type: research

Phase transition of a second kind in nickel as observed through optical reflection under pressure
Publication date: Available online 5 August 2019Source: Physics Letters AAuthor(s): Moris Sudai, Noaz Nissim, Shalom EliezerAbstractThe magnetic permeability of materials at optical frequencies is usually suggested in the literature to be μ=1. In this case one cannot expect to measure the magnetic second order phase transition at optical frequencies. The main novel idea of this paper is that the magnetic permeability μ is not equal to 1 for optical frequency and a phase transition of magnetism was measured experimentally with an optical frequency. In particular, this work presents the detection of a magnetic second o...
Source: Physics Letters A - August 6, 2019 Category: Physics Source Type: research

Orthorhombic C10: A new superdense carbon allotrope
Publication date: Available online 2 August 2019Source: Physics Letters AAuthor(s): Qun Wei, Wen Tong, Ruike Yang, Haiyan Yan, Bing Wei, Meiguang Zhang, Xinchao Yang, Rui ZhangAbstractBy using unbiased crystal structure searching technique combined with first-principles calculations, a new superdense carbon phase C10 (space group: C222) with a density of 3.55g/cm3 (larger than that of diamond (3.50g/cm3)) is uncovered. The C10 phase has a 10-atom unit cell in the full sp3 bonding network. A systematic theoretical study of the electronic, dynamic, optical, and elastic properties of superdense carbon C10 was carried out. In ...
Source: Physics Letters A - August 3, 2019 Category: Physics Source Type: research

Nitrogen-rich GaN5 and GaN6 as High Energy Density Materials With Modest Synthesis Condition
Publication date: Available online 2 August 2019Source: Physics Letters AAuthor(s): Zhao Liu, Da Li, Shuli Wei, Yan Liu, Fubo Tian, Defang Duan, Tian CuiAbstractHere, the energetic gallium nitrides with the network and zigzag poly-nitrogen configurations at modest pressures have been predicted. The nitrogen-rich Cmc21-GaN5, high-pressure P21/m-GaN5 and C2/c-GaN6 phases can release higher energy of ∼3.27 kJ g−1, 4.12 kJ g−1, 5.71 kJ g−1, respectively, which are close to or even higher than that of the traditional high energy density materials TNT and possess distinguished detonation performance simulat...
Source: Physics Letters A - August 3, 2019 Category: Physics Source Type: research

LiB6Si: An indirect band gap semiconductor
Publication date: Available online 2 August 2019Source: Physics Letters AAuthor(s): Zhikang Yuan, Dongli YuAbstractUsing first-principle calculations, mechanical properties, electronic structure, and Raman spectra of LiB6Si structure were investigated. The band structures calculated by GGA-PBE and HSE06 methods reveal that LiB6Si is an indirect band gap semiconductor. The band gap estimated by HSE06 method is about 2.24 eV, which is in good agreement with that of experimental value 2.27 eV. The calculated tensile stress-strain curves of LiB6Si reveal that [010] direction is the cleavage direction under tensile strains. The...
Source: Physics Letters A - August 3, 2019 Category: Physics Source Type: research

Investigate the z-average mean-square radius of gyration of star-shape polymers using the average number of subchains
Publication date: Available online 2 August 2019Source: Physics Letters AAuthor(s): Yuelan Tian, Hongzan Song, Fang Gu, Libin Bai, Haijun Wang, Xinwu BaAbstractThe general treatment is proposed to investigate the explicit expressions of the average number of subchains with definite monomer sequences on the polymer skeleton, in which the AB+Af type polycondensation is chosen as the classical model of polymerization. The linear homo-polymers and star-shape co-polymers are examined to derive the z-average mean-square radius of gyration, respectively, where the mass of monomers are taken into consideration. Furthermore, the z-...
Source: Physics Letters A - August 3, 2019 Category: Physics Source Type: research

Perspectives on spin hydrodynamics in ferromagnetic materials
This article provides an overview of the theoretical foundations of spin hydrodynamics and their physical interpretation in the context of spin transport. We discuss other proposed applications for spin hydrodynamics as well as our view on challenges and future research directions. (Source: Physics Letters A)
Source: Physics Letters A - August 3, 2019 Category: Physics Source Type: research

Efficiency and power enhancement of solar cells by dark states
Publication date: Available online 2 August 2019Source: Physics Letters AAuthor(s): Sangchul OhAbstractWe study how dark states enhance the efficiency and power of a solar cell as a quantum heat engine. Conventional approaches assume the solar cell is in thermal equilibrium with both hot and cold baths simultaneously. We propose an description that a solar cell is surrounded only by the cold bath and the thermal radiation from the hot bath is described by a pumping term in a master equation. We calculated the current-voltage curve, the power-voltage curve, the efficiency, and the power of the solar cell for different photo...
Source: Physics Letters A - August 3, 2019 Category: Physics Source Type: research

Beam-core evolution equation and space-charge limit
Publication date: Available online 31 July 2019Source: Physics Letters AAuthor(s): Taufik, Ken TakayamaAbstractThe nonlinear beam-core evolution equation approach is proposed as a powerful tool to estimate the acceptable beam current in a given circular accelerator. The approach is justified by the macroparticle simulation over a wide beam current parameter region. Space-charge effects on the beam-core evolution are discussed by Poincaré mapping on the beam-core phase space (σ, dσ/ds). The instability seen in the beam-core evolution is rigorously analyzed as an eigenvalue problem in the coupled linear sy...
Source: Physics Letters A - August 2, 2019 Category: Physics Source Type: research

On the thermophoresis in dense dust structures in neon plasma
Publication date: Available online 30 July 2019Source: Physics Letters AAuthor(s): V.V. Shumova, D.N. Polyakov, E.K. Mataybaeva, L.M. VasilyakAbstractNumerical study of the effect of dust particle concentration on the thermophoretic force acting on a dust particle inside a dust structure in plasma has been carried out. The experimental data on the formation of voids in dust structures formed by 2.55 μm dust particles in a glow dc discharge in neon have been used. The simulation has been performed using the diffusion-drift model with taking into account joule heating of discharge. The dependence of the thermophoretic for...
Source: Physics Letters A - July 31, 2019 Category: Physics Source Type: research

Quantifying information loss on chaotic attractors through recurrence networks
Publication date: Available online 30 July 2019Source: Physics Letters AAuthor(s): K.P. Harikrishnan, R. Misra, G. AmbikaAbstractWe propose an entropy measure for the analysis of chaotic attractors through recurrence networks which are un-weighted and un-directed complex networks constructed from time series of dynamical systems using specific criteria. We show that the proposed measure converges to a constant value with increase in the number of data points on the attractor (or the number of nodes on the network) and the embedding dimension used for the construction of the network, and clearly distinguishes between the re...
Source: Physics Letters A - July 31, 2019 Category: Physics Source Type: research

Editors
Publication date: 22 August 2019Source: Physics Letters A, Volume 383, Issue 24Author(s): (Source: Physics Letters A)
Source: Physics Letters A - July 30, 2019 Category: Physics Source Type: research

Shape-induced anisotropy in epitaxial Fe3O4 nanopillars
Publication date: Available online 24 July 2019Source: Physics Letters AAuthor(s): M. Guan, G. Dong, Z. Hu, B. Peng, Y. He, W.Z. Cui, Z. Zhou, M. LiuAbstractFe3O4 nanopillars with remarkably high uniformity and crystallinity are grown on (100)-oriented magnesium aluminate substrates by pulsed laser deposition with a simple anodic-aluminum-oxide template method. Compared with Fe3O4 full film, the nanopillars exhibit higher in-plane magnetic saturation field and lower out-of-plane saturation field. The angular-dependent ferromagnetic resonance, investigated by electron spin resonance spectroscopy, confirms the shape-induced ...
Source: Physics Letters A - July 25, 2019 Category: Physics Source Type: research

Magnetotransport in a zigzag monolayer MoS2 nanoribbon with ferromagnetic electrodes
Publication date: Available online 24 July 2019Source: Physics Letters AAuthor(s): J.-J. Jin, R.-Y. Yuan, Q.-J. Yang, J.L. Tang, A.G. Du, J. Zheng, Y. GuoAbstractIn this research, using the three-band tight-binding model combined with a non-equilibrium Green's function technique, spin-dependent electron transport was investigated in the quantum structure of zigzag monolayer molybdenum disulfide with ferromagnetic electrodes. It was shown that in parallel configurations, the conductance exhibited a quantized oscillating phenomenon, while in the antiparallel configurations with increasing magnetization, the conductance showe...
Source: Physics Letters A - July 25, 2019 Category: Physics Source Type: research

Spin-independent and spin-dependent re-excitation in CdZnTe studied by pump-probe spectroscopy
Publication date: Available online 24 July 2019Source: Physics Letters AAuthor(s): Lihua Teng, Lijun Mu, Xia WangAbstractTime-resolved pump-probe spectroscopy is used to study the re-excitation processes of spin-balanced and spin-polarized electrons trapped by the defect levels in Cd0.86Zn0.14Te. In CdTe, Cd0.96Zn0.04Te, and Cd0.86Zn0.14Te, the electron trapping time and lifetime decrease with the increasing defect density of states that depends on the Zn composition. The abnormal linearly and circularly polarized pump-probe spectroscopies, respectively, demonstrate the presence of spin-independent and spin-dependent re-ex...
Source: Physics Letters A - July 25, 2019 Category: Physics Source Type: research