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Title: Optimisation of geometrical ratchets for spin-current amplification

Abstract

A two-dimensional model is used to study the geometrical effects of a nonmagnetic (NM) nanowire upon a spin-polarised electron current in a lateral spin-valve structure. We found that the implemented ratchet shapes at the centre of the NM have a crucial effect on the diffusive rate for up- and down-spin electrons along the wire, which leads to the amplification of non-local spin-current signals. By using our simple model, the geometries have been optimised. The calculated spin-current signals are in good qualitative agreement with our recent experimental results [Abdullah et al., J. Phys. D: Appl. Phys. 47, 482001(FTC) (2014)]. Our model may be very useful to evaluate such a geometrical effect on spin-polarised electron transport.

Authors:
 [1];  [1];  [2];  [3];  [1];  [4]
  1. Department of Electronics, University of York, Heslington, York YO10 5DD (United Kingdom)
  2. (United Kingdom)
  3. Department of Physics, University of York, York YO10 5DD (United Kingdom)
  4. (Japan)
Publication Date:
OSTI Identifier:
22410036
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; AMPLIFICATION; ELECTRONS; MAGNETORESISTANCE; MATHEMATICAL MODELS; NANOWIRES; OPTIMIZATION; SPIN; TWO-DIMENSIONAL SYSTEMS

Citation Formats

Abdullah, Ranjdar M., Vick, Andrew J., Department of Physics, University of York, York YO10 5DD, Murphy, Benedict A., Hirohata, Atsufumi, E-mail: atsufumi.hirohata@york.ac.uk, and PRESTO, Japan Science and Technology Agency, Kawaguchi 332-0012. Optimisation of geometrical ratchets for spin-current amplification. United States: N. p., 2015. Web. doi:10.1063/1.4916764.
Abdullah, Ranjdar M., Vick, Andrew J., Department of Physics, University of York, York YO10 5DD, Murphy, Benedict A., Hirohata, Atsufumi, E-mail: atsufumi.hirohata@york.ac.uk, & PRESTO, Japan Science and Technology Agency, Kawaguchi 332-0012. Optimisation of geometrical ratchets for spin-current amplification. United States. doi:10.1063/1.4916764.
Abdullah, Ranjdar M., Vick, Andrew J., Department of Physics, University of York, York YO10 5DD, Murphy, Benedict A., Hirohata, Atsufumi, E-mail: atsufumi.hirohata@york.ac.uk, and PRESTO, Japan Science and Technology Agency, Kawaguchi 332-0012. Thu . "Optimisation of geometrical ratchets for spin-current amplification". United States. doi:10.1063/1.4916764.
@article{osti_22410036,
title = {Optimisation of geometrical ratchets for spin-current amplification},
author = {Abdullah, Ranjdar M. and Vick, Andrew J. and Department of Physics, University of York, York YO10 5DD and Murphy, Benedict A. and Hirohata, Atsufumi, E-mail: atsufumi.hirohata@york.ac.uk and PRESTO, Japan Science and Technology Agency, Kawaguchi 332-0012},
abstractNote = {A two-dimensional model is used to study the geometrical effects of a nonmagnetic (NM) nanowire upon a spin-polarised electron current in a lateral spin-valve structure. We found that the implemented ratchet shapes at the centre of the NM have a crucial effect on the diffusive rate for up- and down-spin electrons along the wire, which leads to the amplification of non-local spin-current signals. By using our simple model, the geometries have been optimised. The calculated spin-current signals are in good qualitative agreement with our recent experimental results [Abdullah et al., J. Phys. D: Appl. Phys. 47, 482001(FTC) (2014)]. Our model may be very useful to evaluate such a geometrical effect on spin-polarised electron transport.},
doi = {10.1063/1.4916764},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}