SPIN POLARIZATION IN A MODEL QUANTUM WIRE WITH A CROSS-SECTION
Wang Chuan-kui (王传奎)ab, Wang Hong-song (王洪松)c, Zhang Qing-gang (张庆刚)a
a Department of Physics, Shandong Teachers University, Jinan 250014, China; b Department of Physics and Measurement Technology, Link$\ddot{\rm o}$ping University, S-58183, Link$\ddot{\rm o}$ping, Sweden; c Division of Postgraduate, Shandong Teachers University, Jinan 250014, China
Abstract Numerical investigation of the electronic structure of a small closed quantum system fabricated on the two-dimensional electron gas forming on the interference between GaAs and AlxGa1-xAs is reported. The Kohn-Sham spin-density-fun ctional theory is applied. Self-consistent results show that the quantum system assumes unequal numbers of electrons for spin up and spin down because of the existence of bound states. The profiles of effective potential energies for spin up and spin down electrons are then found to be very different, which will result in different transmission coefficients. It is notable that this spin polarization is caused by the geometry of the nanostructure.
Received: 04 August 1998
Revised: 26 October 1998
Accepted manuscript online:
Fund: Project supported by the Shandong Provincial Foundation for the Encouragement of Distinguished Young and Middle-Aged Scientists (Grant No. 98022), China.
Cite this article:
Wang Chuan-kui (王传奎), Wang Hong-song (王洪松), Zhang Qing-gang (张庆刚) SPIN POLARIZATION IN A MODEL QUANTUM WIRE WITH A CROSS-SECTION 1999 Acta Physica Sinica (Overseas Edition) 8 185
Mobility limited by cluster scattering in ternary alloy quantum wires Zhang Heng (张恒), Yang Shao-Yan (杨少延), Liu Gui-Peng (刘贵鹏), Wang Jian-Xia (王建霞), Jin Dong-Dong (金东东), Li Hui-Jie (李辉杰), Liu Xiang-Lin (刘祥林), Zhu Qin-Sheng (朱勤生), Wang Zhan-Guo (王占国). Chin. Phys. B, 2014, 23(1): 017305.
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