Gate voltage dependent Rashba spin splitting in hole transverse magnetic focusing

被引：8

作者：

Rendell, M. J. ^{[1
]}

Liles, S. D. ^{[1
]}

Srinivasan, A. ^{[1
]}

Klochan, O. ^{[1
,2
]}

Farrer, I ^{[3
,4
]}

Ritchie, D. A. ^{[4
]}

Hamilton, A. R. ^{[1
]}

机构：

[1] Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia

[2] Univ New South Wales Canberra, Canberra, ACT 2600, Australia

[3] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S1 3JD, S Yorkshire, England

[4] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW B | 2022年 / 105卷 / 24期

基金：

英国工程与自然科学研究理事会; 澳大利亚研究理事会;

关键词：

2-DIMENSIONAL ELECTRON;

D O I：

10.1103/PhysRevB.105.245305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic focusing of charge carriers in two-dimensional systems provides a solid state version of a mass spectrometer. In the presence of a spin-orbit interaction, the first focusing peak splits into two spin dependent peaks, allowing focusing to be used to measure spin polarization and the strength of the spin-orbit interaction. In hole systems, the k3 dependence of the Rashba spin-orbit term allows the spatial separation of spins to be changed in situ using a voltage applied to an overall top gate. Here, we demonstrate that this can be used to control the splitting of the magnetic focusing peaks. Additionally, we compare the focusing peak splitting to that predicted by Shubnikov???de Haas oscillations and k ?? p band-structure calculations. We find that the focusing peak splitting is consistently larger than expected, suggesting further work is needed on understanding spin dependent magnetic focusing.

引用

页数：6

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