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Coherent Spin Amplification Using a Beam Splitter.

Published version
Peer-reviewed

Type

Article

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Authors

Yan, Chengyu 
Kumar, Sanjeev 
Thomas, Kalarikad 
See, Patrick 
Farrer, Ian 

Abstract

We report spin amplification using a capacitive beam splitter in n-type GaAs where the spin polarization is monitored via a 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.

Description

Keywords

0299 Other Physical Sciences

Journal Title

Phys Rev Lett

Conference Name

Journal ISSN

0031-9007
1079-7114

Volume Title

120

Publisher

American Physical Society (APS)

Rights

Publisher's own licence
Sponsorship
Engineering and Physical Sciences Research Council (EP/K004077/1)