Gate voltage dependent Rashba spin splitting in hole transverse magnetic focussing
Magnetic focussing 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 focussing peak splits into two spin dependent peaks, allowing focussing to be used to measure spin polarisation and the stren...
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| creator | Rendell, M J Liles, S D Srinivasan, A Klochan, O Farrer, I Ritchie, D A Hamilton, A R |
| description | Magnetic focussing 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 focussing peak splits into two spin dependent peaks, allowing focussing to be used to measure spin polarisation and the strength of the spin-orbit interaction. In hole systems, the k^3 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 focussing peaks. Additionally, we compare the focussing peak splitting to that predicted by Shubnikov-de Haas oscillations and k.p bandstructure calculations. We find that the focussing peak splitting is consistently larger than expected, suggesting further work is needed on understanding spin dependent magnetic focussing. |
| doi_str_mv | 10.48550/arxiv.2204.01223 |
| format | Article |
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In the presence of a spin-orbit interaction, the first focussing peak splits into two spin dependent peaks, allowing focussing to be used to measure spin polarisation and the strength of the spin-orbit interaction. In hole systems, the k^3 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 focussing peaks. Additionally, we compare the focussing peak splitting to that predicted by Shubnikov-de Haas oscillations and k.p bandstructure calculations. We find that the focussing peak splitting is consistently larger than expected, suggesting further work is needed on understanding spin dependent magnetic focussing.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.2204.01223</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Current carriers ; Electric potential ; Physics - Mesoscale and Nanoscale Physics ; Polarization (spin alignment) ; Spin-orbit interactions ; Splitting ; Voltage</subject><ispartof>arXiv.org, 2022-04</ispartof><rights>2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). 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| subjects | Current carriers Electric potential Physics - Mesoscale and Nanoscale Physics Polarization (spin alignment) Spin-orbit interactions Splitting Voltage |
| title | Gate voltage dependent Rashba spin splitting in hole transverse magnetic focussing |
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