TITLE

Observation of chiral quantum-Hall edge states in graphene

AUTHOR(S)
Ki, Dong-Keun; Jo, Sanghyun; Lee, Hu-Jong
PUB. DATE
April 2009
SOURCE
Applied Physics Letters;4/20/2009, Vol. 94 Issue 16, p162113
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this study, we determined the chiral direction of the quantum-Hall (QH) edge states in graphene by adopting simple two-terminal conductance measurements while grounding different edge positions of the sample. The edge state with a smaller filling factor is found to more strongly interact with the electric contacts. This simple method can be conveniently used to investigate the chirality of the QH edge state with zero filling factor in graphene, which is important to understand the symmetry breaking sequence in high magnetic fields (>=25 T).
ACCESSION #
38225269

 

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