Transconductance fluctuations as a probe for interaction-induced quantum Hall states in Graphene

Title
Transconductance fluctuations as a probe for interaction-induced quantum Hall states in Graphene
Authors
이동수Viera SkakalovaR. Thomas WeitzKlaus von KlitzingJurgen H. Smet
Issue Date
2012-08
Publisher
Physical review letters
Citation
VOL 109, NO 5, 056602-1-056602-5
Abstract
Transport measurements normally provide a macroscopic, averaged view of the sample so that disorder prevents the observation of fragile interaction-induced states. Here, we demonstrate that transconductance fluctuations in a graphene field effect transistor reflect charge localization phenomena on the nanometer scale due to the formation of a dot network which forms near incompressible quantum states. These fluctuations give access to fragile broken symmetry and fractional quantum Hall states even though these states remain hidden in conventional magnetotransport quantities.
URI
http://pubs.kist.re.kr/handle/201004/43431
ISSN
00319007
Appears in Collections:
KIST Publication > Article
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