Magnetoresistance in inhomogeneous graphene/metal hybrids
Magnetoresistance in inhomogeneous graphene/metal hybrids
We investigate extraordinary magnetoresistance (EMR) of inhomogeneous graphene-metal hybrids using finite element modelling. Inhomogeneous graphene is a binary system made of electron and hole puddles. Two geometries of the embedded metallic structure were considered: circular and fishbone geometries. We found that the breaking of graphene into charge puddles weakens the magnetoresistance of the hybrid system compared to a homogeneous graphene-metal system. For a fixed value of the magnetic field, the magnetoresistance increases with decreasing area fraction occupied by electrons puddles. Fishbone geometry showed an enhanced magnetoresistance compared to circular geometry. The EMR is also investigated as a function of the contact resistance for the fishbone geometry where it was found that a minimal contact resistance is essential to obtain enhanced EMR in graphene-metal hybrid devices
083907-[6pp]
Moktadir, Zakaria
34472668-ffda-4287-8fea-2c4f3bf1e2fa
Mizuta, Hiroshi
f14d5ffc-751b-472b-8dba-c8518c6840b9
27 February 2013
Moktadir, Zakaria
34472668-ffda-4287-8fea-2c4f3bf1e2fa
Mizuta, Hiroshi
f14d5ffc-751b-472b-8dba-c8518c6840b9
Moktadir, Zakaria and Mizuta, Hiroshi
(2013)
Magnetoresistance in inhomogeneous graphene/metal hybrids.
Journal of Applied Physics, 113, .
(doi:10.1063/1.4793647).
Abstract
We investigate extraordinary magnetoresistance (EMR) of inhomogeneous graphene-metal hybrids using finite element modelling. Inhomogeneous graphene is a binary system made of electron and hole puddles. Two geometries of the embedded metallic structure were considered: circular and fishbone geometries. We found that the breaking of graphene into charge puddles weakens the magnetoresistance of the hybrid system compared to a homogeneous graphene-metal system. For a fixed value of the magnetic field, the magnetoresistance increases with decreasing area fraction occupied by electrons puddles. Fishbone geometry showed an enhanced magnetoresistance compared to circular geometry. The EMR is also investigated as a function of the contact resistance for the fishbone geometry where it was found that a minimal contact resistance is essential to obtain enhanced EMR in graphene-metal hybrid devices
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Published date: 27 February 2013
Organisations:
Nanoelectronics and Nanotechnology
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Local EPrints ID: 349302
URI: http://eprints.soton.ac.uk/id/eprint/349302
ISSN: 0021-8979
PURE UUID: af3bd569-8eda-4062-8c09-925c0649b0b4
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Date deposited: 04 Mar 2013 10:03
Last modified: 14 Mar 2024 13:12
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Author:
Zakaria Moktadir
Author:
Hiroshi Mizuta
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