Efficient room-temperature spin detector based on GaNAs | Zendy

Yuttapoom Puttisong | Zendy; I. A. Buyanova | Zendy; Lutz Geelhaar | Zendy; H. Riechert | Zendy; C. W. Tu | Zendy; Weimin Chen | Zendy

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Efficient room-temperature spin detector based on GaNAs

Author(s) -

Yuttapoom Puttisong,

I. A. Buyanova,

Lutz Geelhaar,

H. Riechert,

C. W. Tu,

Weimin Chen

Publication year - 2012

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3671781

Subject(s) - spin polarization , spinplasmonics , spin (aerodynamics) , detector , condensed matter physics , electron , materials science , polarization (electrochemistry) , optoelectronics , spin hall effect , physics , chemistry , optics , nuclear physics , thermodynamics

Efficient and highly spin-dependent recombination processes are shown to not only turn GaNAs into an efficient spin filter but also to make it an excellent spin detector functional at room temperature (RT). By taking advantage of the defect-engineered spin-filtering effect, the spin detection efficiency is no longer limited by the fast spin relaxation of conduction electrons. This leads to a significant enhancement in the optical polarization of the spin detector, making it possible to reliably detect even very weak electron spin polarization at RT, as demonstrated by a study of spin loss during optical spin injection across a GaAs/GaNAs interface

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