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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/25977
Title: Detection of current induced spin polarization in epitaxial Bi2Te3 thin film
Authors: Dey R.
Roy A.
Pramanik, Tanmoy
Rai A.
Heon Shin S.
Majumder S.
Register L.F.
Banerjee S.K.
Published in: Applied Physics Letters
Abstract: We electrically detect charge current induced spin polarization on the surface of a molecular beam epitaxy grown Bi2Te3 thin film in a two-terminal device with a ferromagnetic MgO/Fe contact and a nonmagnetic Ti/Au contact. The two-point resistance, measured in an applied magnetic field, shows a hysteresis tracking the magnetization of Fe. A theoretical estimate is obtained for the change in resistance on reversing the magnetization direction of Fe from coupled spin-charge transport equations based on the quantum kinetic theory. The order of magnitude and the sign of the hysteresis are consistent with the spin-polarized surface state of Bi2Te3. © 2017 Author(s).
Citation: Applied Physics Letters, 110(12)
URI: https://doi.org/10.1063/1.4978691
http://repository.iitr.ac.in/handle/123456789/25977
Issue Date: 2017
Publisher: American Institute of Physics Inc.
Keywords: Hysteresis
Magnetization
Molecular beam epitaxy
Polarization
Quantum chemistry
Thin films
Applied magnetic fields
Charge current
Coupled spins
Magnetization direction
Quantum-kinetic theory
Spin-polarized surface state
Transport equation
Two-terminal devices
Spin polarization
ISSN: 36951
Author Scopus IDs: 57225425824
35180233300
55938287000
55672148400
57193731918
57210240037
35598581900
55566203800
Author Affiliations: Dey, R., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States
Roy, A., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States
Pramanik, T., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States
Rai, A., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States
Heon Shin, S., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States
Majumder, S., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States
Register, L.F., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States
Banerjee, S.K., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States
Funding Details: This work was supported by the NRI SWAN and the NSF NNCI Program. National Science Foundation, NSF; Niroo Research Institute, NRI
Appears in Collections:Journal Publications [ECE]

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