Spin polarization and temperature dependence of electron effective mass in quantum wires

Publication date: Available online 4 April 2019Source: Physics Letters AAuthor(s): Le Van-Tan, Trieu Van Thang, Nguyen Duy Vy, Huy Thien CaoAbstractThe electron effective mass in GaAs quantum wires has been estimated by using a full dynamical random-phase approximation to examine its properties versus spin polarization, temperature, and carrier density. A decrease of mass with spin polarization is seen. The minority mass increases with the polarization while the majority mass decreases and this behaviour is seen for all densities. A maximal enhancement of mass at moderate temperature around 25 K is also presented. These calculations show a qualitative consistence with results in two-dimensional systems and help to control the electronic transport in quantum wires.

Source: Physics Letters A - April 5, 2019 Category: Physics Source Type: research