Title |
Temperature Dependence of Spin-Split Peaks in Transverse Electron Focusing
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Published in |
Discover Nano, September 2017
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DOI | 10.1186/s11671-017-2321-4 |
Pubmed ID | |
Authors |
Chengyu Yan, Sanjeev Kumar, Michael Pepper, Patrick See, Ian Farrer, David Ritchie, Jonathan Griffiths, Geraint Jones |
Abstract |
We present experimental results of transverse electron-focusing measurements performed using n-type GaAs. In the presence of a small transverse magnetic field (B⊥), electrons are focused from the injector to detector leading to focusing peaks periodic in B⊥. We show that the odd-focusing peaks exhibit a split, where each sub-peak represents a population of a particular spin branch emanating from the injector. The temperature dependence reveals that the peak splitting is well defined at low temperature whereas it smears out at high temperature indicating the exchange-driven spin polarisation in the injector is dominant at low temperatures. |
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