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

What is it about?

The 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.

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Why is it important?

• Spin and temperature dependence of quantum wire is analyzed. • Majority mass increases with spin polarization while minority mass decreases. • Majority mass is significantly enhanced below 50 K and peaks at 25 K. • Consistent results with two-dimensional values are seen.