Temperature Dependence of Spin-Split Peaks in Transverse Electron Focusing

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.

References in corpus (8)

• Wigner crystal physics in quantum wires
• Incipient Formation of an Electron Lattice in a Weakly-Confined Quantum Wire
• Transverse Electron Focusing in Systems with Spin-Orbit Coupling
• Many-body effects in a quasi-one-dimensional electron gas
• Detection of spin polarized currents in quantum point contacts via transverse electron focusing
• Direct observation of exchange-driven spin interactions in one-dimensional system
• Fano Resonance in a cavity-reflector hybrid system
• Interference Effects in a Tunable Quantum Point Contact Integrated with an Electronic Cavity