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Title: Current-based detection of nonlocal spin transport in graphene for spin-based logic applications

Abstract

Graphene has been proposed for novel spintronic devices due to its robust and efficient spin transport properties at room temperature. Some of the most promising proposals require current-based readout for integration purposes, but the current-based detection of spin accumulation has not yet been developed. In this work, we demonstrate current-based detection of spin transport in graphene using a modified nonlocal geometry. By adding a variable shunt resistor in parallel to the nonlocal voltmeter, we are able to systematically cross over from the conventional voltage-based detection to current-based detection. As the shunt resistor is reduced, the output current from the spin accumulation increases as the shunt resistance drops below a characteristic value R*. We analyze this behavior using a one-dimensional drift-diffusion model, which accounts well for the observed behavior. These results provide the experimental and theoretical foundation for current-based detection of nonlocal spin transport.

Authors:
;  [1]; ;
  1. Department of Physics and Astronomy, University of California, Riverside, California 92521 (United States)
Publication Date:
OSTI Identifier:
22273757
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 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; DIFFUSION; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; GRAPHENE; READOUT SYSTEMS; SEMICONDUCTOR RESISTORS; SPIN; TEMPERATURE RANGE 0273-0400 K

Citation Formats

Wen, Hua, Amamou, Walid, Zhu, Tiancong, Luo, Yunqiu, Kawakami, Roland K., E-mail: roland.kawakami@ucr.edu, and Department of Physics, The Ohio State University, Columbus, Ohio 43210. Current-based detection of nonlocal spin transport in graphene for spin-based logic applications. United States: N. p., 2014. Web. doi:10.1063/1.4868084.
Wen, Hua, Amamou, Walid, Zhu, Tiancong, Luo, Yunqiu, Kawakami, Roland K., E-mail: roland.kawakami@ucr.edu, & Department of Physics, The Ohio State University, Columbus, Ohio 43210. Current-based detection of nonlocal spin transport in graphene for spin-based logic applications. United States. https://doi.org/10.1063/1.4868084
Wen, Hua, Amamou, Walid, Zhu, Tiancong, Luo, Yunqiu, Kawakami, Roland K., E-mail: roland.kawakami@ucr.edu, and Department of Physics, The Ohio State University, Columbus, Ohio 43210. 2014. "Current-based detection of nonlocal spin transport in graphene for spin-based logic applications". United States. https://doi.org/10.1063/1.4868084.
@article{osti_22273757,
title = {Current-based detection of nonlocal spin transport in graphene for spin-based logic applications},
author = {Wen, Hua and Amamou, Walid and Zhu, Tiancong and Luo, Yunqiu and Kawakami, Roland K., E-mail: roland.kawakami@ucr.edu and Department of Physics, The Ohio State University, Columbus, Ohio 43210},
abstractNote = {Graphene has been proposed for novel spintronic devices due to its robust and efficient spin transport properties at room temperature. Some of the most promising proposals require current-based readout for integration purposes, but the current-based detection of spin accumulation has not yet been developed. In this work, we demonstrate current-based detection of spin transport in graphene using a modified nonlocal geometry. By adding a variable shunt resistor in parallel to the nonlocal voltmeter, we are able to systematically cross over from the conventional voltage-based detection to current-based detection. As the shunt resistor is reduced, the output current from the spin accumulation increases as the shunt resistance drops below a characteristic value R*. We analyze this behavior using a one-dimensional drift-diffusion model, which accounts well for the observed behavior. These results provide the experimental and theoretical foundation for current-based detection of nonlocal spin transport.},
doi = {10.1063/1.4868084},
url = {https://www.osti.gov/biblio/22273757}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 115,
place = {United States},
year = {Wed May 07 00:00:00 EDT 2014},
month = {Wed May 07 00:00:00 EDT 2014}
}