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Applied Physics Letters / Volume 96 / Issue 26 / ELECTRONIC TRANSPORT AND SEMICONDUCTORS

Appl. Phys. Lett. 96, 262108 (2010); http://dx.doi.org/10.1063/1.3455887 (3 pages)

Photoexcited charge current for the presence of pure spin current

Yu Liu, Yonghai Chen, and Zhanguo Wang

Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, People's Republic of China

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(Received 31 March 2010; accepted 27 May 2010; published online 29 June 2010)

The asymmetric spin distribution in k space caused by the pure spin current (PSC) can introduce a photoexcited charge current (PECC). This provides us a practical scheme for direct detection of PSC. We demonstrate theoretically that the PECC related to the PSC depends sensitively on the wave vector and spin orientation of the carriers, more important, the helicity dependence of this PECC provides us a way to refine it from the helicity independent background current by tuning the polarized laser beams from left to right circular polarization.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

photoexcitation, spin polarised transport

PACS

  • 72.25.Dc

    Spin polarized transport in semiconductors

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3455887

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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