Channel width effect on the spin-orbit interaction parameter in a two-dimensional electron gas

被引:40
作者
Kwon, Jae Hyun
Koo, Hyun Cheol [1 ]
Chang, Joonyeon
Han, Suk-Hee
Eom, Jonghwa
机构
[1] Korea Inst Sci & Technol, Nano Device Res Ctr, Seoul 136791, South Korea
[2] Sejong Univ, Dept Phys, Seoul 143747, South Korea
关键词
D O I
10.1063/1.2714993
中图分类号
O59 [应用物理学];
学科分类号
摘要
The spin splitting energy obtained from the Shubnikov-de Haas oscillation increases with decreasing channel width (w) of the InAs-based heterostructure. Since the surface charge concentration depends only weakly on w, the channel width dependence of the spin splitting energy is attributed to variations in the spin-orbit interaction strength. The spin-orbit interaction parameter was found to be inversely proportional to root w in the range of w=2-64 mu m. Our findings indicate that a strong spin-orbit interaction is induced in a narrow channel due to suppression of the spin precession length for a thin quantum well layer system. (c) 2007 American Institute of Physics.
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页数:3
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