Splitting of the quantum Hall transition in disordered graphenes

被引：44

作者：

Koshino, Mikito ^{[1
]}

Ando, Tsuneya ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.75.033412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Integer quantum Hall effect is studied for a noninteracting electron in a monolayer graphene. We calculate the Hall conductivity within a single Landau level in the presence of randomness in the bond couplings and in the on-site potential, and estimate the critical energies for the quantum Hall transition. We show that valley-degenerated (K and K-' points) Landau levels contain two displaced critical energies indicating that an extra Hall plateau appears inside, while the localization is found to be much stronger in the Landau level N=0 than in N=1.

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页数：4

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