Spin-gapped phases in the frustrated Hubbard chain with transverse spin anisotropy

Publication date: Available online 27 July 2018Source: Physics Letters AAuthor(s): Hanqin Ding, Na Zhao, Xueling Shi, Jun Zhang, Yongdong HeAbstractAt weak coupling, we investigate the frustrated Hubbard chain including nearest-neighbor and next-nearest-neighbor antiferromagnetic exchange with easy-plane anisotropy J1xy and J2xy. At half filling, we obtain three different phases in the J1xy–J2xy plane: a transverse spin density wave phase, a bond order wave phase and a Luther–Emery metallic phase characterized by the coexistence of singlet superconductivity and charge density wave correlations. The frustrating exchange J2xy accounts for the spin-gapped phases.

Source: Physics Letters A - July 28, 2018 Category: Physics Source Type: research