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High-Temperature Fractional Quantum Hall States

Evelyn Tang, Jia-Wei Mei, and Xiao-Gang Wen
Phys. Rev. Lett. 106, 236802 – Published 6 June 2011
Physics logo See Viewpoint: Fractional quantum Hall effect without Landau levels

Abstract

We show that a suitable combination of geometric frustration, ferromagnetism, and spin-orbit interactions can give rise to nearly flatbands with a large band gap and nonzero Chern number. Partial filling of the flatband can give rise to fractional quantum Hall states at high temperatures (maybe even room temperature). While the identification of material candidates with suitable parameters remains open, our work indicates intriguing directions for exploration and synthesis.

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  • Received 14 December 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.236802

© 2011 American Physical Society

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Fractional quantum Hall effect without Landau levels

Published 6 June 2011

Researchers develop models that could exhibit a fractional quantum Hall effect in the absence of an external magnetic field.

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Authors & Affiliations

Evelyn Tang1, Jia-Wei Mei1,2, and Xiao-Gang Wen1

  • 1Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 2Institute for Advanced Study, Tsinghua University, Beijing, 100084, People’s Republic of China

See Also

Nearly Flatbands with Nontrivial Topology

Kai Sun, Zhengcheng Gu, Hosho Katsura, and S. Das Sarma
Phys. Rev. Lett. 106, 236803 (2011)

Fractional Quantum Hall States at Zero Magnetic Field

Titus Neupert, Luiz Santos, Claudio Chamon, and Christopher Mudry
Phys. Rev. Lett. 106, 236804 (2011)

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Issue

Vol. 106, Iss. 23 — 10 June 2011

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