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Phys Rev Lett. 2011 Jun 10;106(23):236802. Epub 2011 Jun 6.

High-temperature fractional quantum Hall states.

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Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.


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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