期刊
APPLIED PHYSICS LETTERS
卷 116, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5142021
关键词
-
资金
- Institute of Materials Science and Engineering at Washington University
- NSF [DMR-1810305]
We report a proof-of-concept study of extraordinary magnetoresistance (EMR) in devices of monolayer graphene encapsulated in hexagonal boron nitride having metallic edge contacts and a central metal shunt. Extremely large EMR values, MR = (R(B) - R-0)/R-0 similar to 10(5), are achieved in part because R-0 approaches or crosses zero as a function of the gate voltage, exceeding that achieved in high mobility bulk semiconductor devices. We highlight the sensitivity, dR/dB, which in two-terminal measurements is the highest yet reported for EMR devices and in particular exceeds previous results in graphene-based devices by a factor of 20. An asymmetry in the zero-field transport is traced to the presence of pn-junctions at the graphene-metal shunt interface. Published under license by AIP Publishing.
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