Quantum hall effect of massless dirac fermions in a vanishing magnetic field

Kentaro Nomura, Shinsei Ryu, Mikito Koshino, Christopher Mudry, Akira Furusaki

研究成果: Article査読

54 被引用数 (Scopus)

抄録

The effect of strong long-range disorder on the quantization of the Hall conductivity σxy in graphene is studied numerically. It is shown that increasing Landau-level mixing progressively destroys all plateaus in σxy except the plateaus at σxy= e2/2h (per valley and per spin). The critical state at the Dirac point is robust to strong disorder and belongs to the universality class of the conventional plateau transitions in the integer quantum Hall effect. We propose that the breaking of time-reversal symmetry by ripples in graphene can realize this quantum critical point in a vanishing magnetic field.

本文言語English
論文番号246806
ジャーナルPhysical review letters
100
24
DOI
出版ステータスPublished - 2008 6月 20

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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