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Updated: Feb 22, 2026

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
Published on: July 4, 2016
Temperature Dependence of Spin-Split Peaks in Transverse Electron Focusing
Chengyu Yan1,2, Sanjeev Kumar3,4, Michael Pepper3,4
1London Centre for Nanotechnology, 17-19 Gordon Street, London, WC1H 0AH, United Kingdom. uceeya3@ucl.ac.uk.
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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