红外与毫米波学报, 2014, 33 (2): 134, 网络出版: 2014-05-06
In0.53Ga0.47As/In0.52Al0.48As量子阱二维电子气中的零场自旋分裂与塞曼分裂
The zero field spin splitting and Zeeman splitting in the In0.53Ga0.47As/In0.52Al0.48As quantum well
InGaAs/InAlAs量子阱 零场自旋分裂 塞曼分裂 有效g因子 InGaAs/InAlAs quantum well zero-field spin splitting Zeeman splitting effective g-factor
摘要
利用变角度磁输运方法研究了高迁移率、高浓度、宽度为20 nm、 单边δ掺杂的 In0.53Ga0.47As/In0.52Al0.48As量子阱，根据量子阱平面与磁场不同夹角时SdH振荡的拍频节点移动，提取了其自旋分裂能Δ0和有效g因子|g*|，发现Δ0随浓度增加而增大，|g*|随浓度增加而减小.进一步的分析和计算表明，|g*|减小是由量子阱能带结构的非抛物性作用引起的.
Abstract
The zero-field spin splitting and Zeeman splitting in the In0.53Ga0.47As/In0.52Al0.48As quantum well (QW) were extracted by a Shubnikov-de Haas oscillations (SdH) beating pattern analysis under different tilt angles between QW plane and external magnetic field. It is found that the zero-field spin splitting Δ0 increases with increasing carrier concentration while the effective g-factor |g*| decreases. The further calculation indicated that the decrease of |g*| with concentration is ascribed to the nonparabolic effect of the band structure.
刘新智, 徐勇刚, 俞国林, 林铁, 郭少令, 褚君浩, 张永刚. In0.53Ga0.47As/In0.52Al0.48As量子阱二维电子气中的零场自旋分裂与塞曼分裂[J]. 红外与毫米波学报, 2014, 33(2): 134. LIU Xin-Zhi, XU Yong-Gang, YU Guo-Lin, LIN Tie, GUO Shao-Ling, CHU Jun-Hao, ZHANG Yong-Gang. The zero field spin splitting and Zeeman splitting in the In0.53Ga0.47As/In0.52Al0.48As quantum well[J]. Journal of Infrared and Millimeter Waves, 2014, 33(2): 134.
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