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.
@article{arxiv.1709.07861,
title = {Temperature Dependence of Spin-Split Peaks in Transverse Electron Focusing},
author = {Chengyu Yan and Sanjeev Kumar and Michael Pepper and Patrick See and Ian Farrer and David Ritchie and Jonathan Griffiths and Geraint Jones},
journal= {arXiv preprint arXiv:1709.07861},
year = {2017}
}