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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:1803.10171 (cond-mat)
[Submitted on 27 Mar 2018]

Title:Coherent Spin Amplification Using a Beam Splitter

Authors:Chengyu Yan, Sanjeev Kumar, Kalarikad Thomas, Patrick See, Ian Farrer, David Ritchie, Jonathan Griffiths, Geraint Jones, Michael Pepper
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Abstract:We report spin amplification using a capacitive beam splitter in n-type GaAs where the spin polarization is monitored via transverse electron focusing measurement. It is shown that partially spin-polarized current injected by the emitter can be precisely controlled and the spin polarization associated with it can be amplified by the beam splitter, such that a considerably high spin polarization of around 50% can be obtained. Additionally, the spin remains coherent as shown by the observation of quantum interference. Our results illustrate that spin polarization amplification can be achieved in materials without strong spin-orbit interaction.
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Cite as: arXiv:1803.10171 [cond-mat.mes-hall]
  (or arXiv:1803.10171v1 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.1803.10171
Journal reference: Phys. Rev. Lett. 120, 137701 (2018)
Related DOI: https://doi.org/10.1103/PhysRevLett.120.137701

Submission history

From: Chengyu Yan [view email]
[v1] Tue, 27 Mar 2018 16:38:55 UTC (2,586 KB)
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