Anomalous spin-orbit coupling in high-density two-dimensional electron gas confined in InGaAs/InAlAs quantum well

作者：Gao, K. H.^*; Lin, T.; Wei, L. M.; Liu, X. Z.; Chen, X.; Yu, G.; Gu, Y.; Zhang, Y. G.; Dai, N.; Chu, J. H.

来源：Solid State Communications, 2012, 152(12): 1042-1046.

DOI：10.1016/j.ssc.2012.03.023

• InGaAs/InAlAs quantum well
• Spin-orbit coupling
• Rashba spin splitting

We study the magnetotransport property of a high-density two-dimensional electron gas confined in InGaAs/InAlAs quantum well. Both beating pattern in the Shubnikov-de Hass oscillation of resistivity and weak antilocalization effect are observed. From these two effects, Rashba spin-splitting energy is extracted. The extracted Rashba spin-splitting energy shows a nonmonotonic dependence on Fermi wave vector, contrary to the prevailing linear Rashba model. This anomalous behavior can be attributed to the nonlinear Rashba spin-splitting mechanism [Yang et al., Phys. Rev. B 74 (2006) 193314].

• 出版日期2012-6
• 单位中国科学院上海微系统与信息技术研究所; 中国科学院上海技术物理研究所; 华东师范大学; 信息功能材料国家重点实验室