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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2013, Volume 98, Issue 5, Pages 323–326
DOI: https://doi.org/10.7868/S0370274X13170086 (Mi jetpl3512) 		 
This article is cited in 2 scientific papers (total in 2 papers)

CONDENSED MATTER

Spin injection from topological insulator tunnel-coupled to metallic leads

P. P. Aseevab, S. N. Artemenkoba

a Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow
b Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow region
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DOI: https://doi.org/10.7868/S0370274X13170086
Abstract: We study theoretically helical edge states of 2D and 3D topological insulators (TI) tunnel-coupled to metal leads and show that their transport properties are strongly affected by contacts as the latter play a role of a heat bath and induce damping and relaxation of electrons in the helical states of TI. A simple structure that produces a pure spin current in the external circuit is proposed. The current and spin current delivered to the external circuit depend on relation between characteristic lengths: damping length due to tunneling, contact length and, in case of 3D TI, mean free path and spin relaxation length caused by momentum scattering. If the damping length due to tunneling is the smallest one, then the electric and spin currents are proportional to the conductance quantum in 2D TI, and to the conductance quantum multiplied by the ratio of the contact width to the Fermi wavelength in 3D TI.
Received: 23.07.2013
English version:
Journal of Experimental and Theoretical Physics Letters, 2013, Volume 98, Issue 5, Pages 285–288
DOI: https://doi.org/10.1134/S0021364013180045
Bibliographic databases:
Document Type: Article
Language: English
Citation: P. P. Aseev, S. N. Artemenko, “Spin injection from topological insulator tunnel-coupled to metallic leads”, Pis'ma v Zh. Èksper. Teoret. Fiz., 98:5 (2013), 323–326; JETP Letters, 98:5 (2013), 285–288
Citation in format AMSBIB
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    • This publication is cited in the following 2 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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