Quantum hall ferromagnetism in graphene

Kentaro Nomura; Allan H. MacDonald

doi:10.1103/PhysRevLett.96.256602

Quantum hall ferromagnetism in graphene

Kentaro Nomura, Allan H. MacDonald

Materials Property Division

Research output: Contribution to journal › Article › peer-review

607 Citations (Scopus)

Abstract

Graphene is a two-dimensional carbon material with a honeycomb lattice and Dirac-like low-energy excitations. When Zeeman and spin-orbit interactions are neglected, its Landau levels are fourfold degenerate, explaining the 4e2/h separation between quantized Hall conductivity values seen in recent experiments. In this Letter we derive a criterion for the occurrence of interaction-driven quantum Hall effects near intermediate integer values of e2/h due to charge gaps in broken symmetry states.

Original language	English
Article number	256602
Journal	Physical review letters
Volume	96
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.96.256602
Publication status	Published - 2006

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.96.256602

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