Room-temperature defect-engineered spin filter based on a non-magnetic semiconductor.

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Wang, XingjunLinköpings universitet,Funktionella elektroniska material,Tekniska högskolan (author)

Room-temperature defect-engineered spin filter based on a non-magnetic semiconductor.

Article/chapterEnglish2009

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2009-02-15
Springer Science and Business Media LLC,2009
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LIBRIS-ID:oai:DiVA.org:liu-17085
https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-17085URI
https://doi.org/10.1038/nmat2385DOI

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Language:English
Summary in:English

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Original Publication:Xingjun Wang, I A Buyanova, F Zhao, D Lagarde, A Balocchi, X Marie, C W Tu, J C Harmand and Weimin Chen, Room-temperature defect-engineered spin filter based on a non-magnetic semiconductor., 2009, Nature Materials, (8), 3, 198-202.http://dx.doi.org/10.1038/nmat2385Copyright: Nature Publishing Grouphttp://npg.nature.com/
Generating, manipulating and detecting electron spin polarization and coherence at room temperature is at the heart of future spintronics and spin-based quantum information technology. Spin filtering, which is a key issue for spintronic applications, has been demonstrated by using ferromagnetic metals, diluted magnetic semiconductors, quantum point contacts, quantum dots, carbon nanotubes, multiferroics and so on. This filtering effect was so far restricted to a limited efficiency and primarily at low temperatures or under a magnetic field. Here, we provide direct and unambiguous experimental proof that an electron-spin-polarized defect, such as a Ga(i) self-interstitial in dilute nitride GaNAs, can effectively deplete conduction electrons with an opposite spin orientation and can thus turn the non-magnetic semiconductor into an efficient spin filter operating at room temperature and zero magnetic field. This work shows the potential of such defect-engineered, switchable spin filters as an attractive alternative to generate, amplify and detect electron spin polarization at room temperature without a magnetic material or external magnetic fields.

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NATURAL SCIENCES
NATURVETENSKAP

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Buyanova, Irina ALinköpings universitet,Funktionella elektroniska material,Tekniska högskolan(Swepub:liu)iribo40 (author)
Zhao, FUniversité de Toulouse (author)
Lagarde, DUniversité de Toulouse (author)
Balocchi, AUniversité de Toulouse (author)
Marie, XUniversité de Toulouse (author)
Tu, C WUniversity of California (author)
Harmand, J CLPN, France (author)
Chen, WeiminLinköpings universitet,Funktionella elektroniska material,Tekniska högskolan(Swepub:liu)weich55 (author)
Linköpings universitetFunktionella elektroniska material (creator_code:org_t)

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In:Nature Materials: Springer Science and Business Media LLC8:3, s. 198-2021476-11221476-4660

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