Transconductance Fluctuations as a Probe for Interaction-Induced Quantum Hall States in Graphene

Authors
Lee, Dong SuSkakalova, VieraWeitz, R. Thomasvon Klitzing, KlausSmet, Jurgen H.
Issue Date
2012-08-02
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.109, no.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.
Keywords
DIRAC-FERMIONS; LOCALIZATION; DIRAC-FERMIONS; LOCALIZATION
ISSN
0031-9007
URI
https://pubs.kist.re.kr/handle/201004/128982
DOI
10.1103/PhysRevLett.109.056602
Appears in Collections:
KIST Article > 2012
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