Measurement of the ν=1/3 Fractional Quantum Hall Energy Gap in Suspended Graphene

被引：76

作者：

Ghahari, Fereshte ^{[1
]}

Zhao, Yue ^{[1
]}

Cadden-Zimansky, Paul ^{[1
]}

Bolotin, Kirill ^{[1
]}

Kim, Philip ^{[1
]}

机构：

[1] Columbia Univ, Dept Phys, New York, NY 10027 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.106.046801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on magnetotransport measurements of multiterminal suspended graphene devices. Fully developed integer quantum Hall states appear in magnetic fields as low as 2 T. At higher fields the formation of longitudinal resistance minima and transverse resistance plateaus are seen corresponding to fractional quantum Hall states, most strongly for nu = 1/3. By measuring the temperature dependence of these resistance minima, the energy gap for the 1/3 fractional state in graphene is determined to be at similar to 20 K at 14 T.

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页数：4

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