Spin splitting modulated by uniaxial stress in InAs nanowires


Autoria(s): Liu GH (Liu Genhua); Chen YH (Chen Yonghai); Jia CH (Jia Caihong); Hao GD (Hao Guo-Dong); Wang ZG (Wang Zhanguo)
Data(s)

2011

Resumo

We theoretically study the electronic structure, spin splitting, effective mass, and spin orientation of InAs nanowires with cylindrical symmetry in the presence of an external electric field and uniaxial stress. Using an eight-band k center dot p theoretical model, we deduce a formula for the spin splitting in the system, indicating that the spin splitting under uniaxial stress is a nonlinear function of the momentum and the electric field. The spin splitting can be described by a linear Rashba model when the wavevector and the electric field are sufficiently small. Our numeric results show that the uniaxial stress can modulate the spin splitting. With the increase of wavevector, the uniaxial tensile stress first restrains and then amplifies the spin splitting of the lowest electron state compared to the no strain case. The reverse is true under a compression. Moreover, strong spin splitting can be induced by compression when the top of the valence band is close to the bottom of the conductance band, and the spin orientations of the electron stay almost unchanged before the overlap of the two bands.

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The work was supported by the 973 program (2006CB604908, 2006CB921607), and the National Natural Science Foundation of China (60625402, 60990313).

国内

The work was supported by the 973 program (2006CB604908, 2006CB921607), and the National Natural Science Foundation of China (60625402, 60990313).

Identificador

http://ir.semi.ac.cn/handle/172111/20686

http://www.irgrid.ac.cn/handle/1471x/105315

Idioma(s)

英语

Fonte

Liu GH (Liu Genhua), Chen YH (Chen Yonghai), Jia CH (Jia Caihong), Hao GD (Hao Guo-Dong), Wang ZG (Wang Zhanguo).Spin splitting modulated by uniaxial stress in InAs nanowires.JOURNAL OF PHYSICS-CONDENSED MATTER,2011,23(1):Art. No. 015801

Palavras-Chave #半导体材料 #NARROW-GAP SEMICONDUCTOR #INVERSION-ASYMMETRY #QUANTUM DOTS #BAND #STATES
Tipo

期刊论文