Interaction-driven spectrum reconstruction in bilayer graphene

A.S. Mayorov; D.C. Elias; Marcin Mucha-Kruczynski; R.V. Gorbachev; T. Tudorovskiy; A. Zhukov; S.V. Morozov; M.I. Katsnelson; V.I. Fal'ko; A.K. Geim; K.S. Novoselov

doi:10.1126/science.1208683

Interaction-driven spectrum reconstruction in bilayer graphene

A.S. Mayorov, D.C. Elias, Marcin Mucha-Kruczynski, R.V. Gorbachev, T. Tudorovskiy, A. Zhukov, S.V. Morozov, M.I. Katsnelson, V.I. Fal'ko, A.K. Geim, K.S. Novoselov

Department of Physics

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

202 Citations (Scopus)

Abstract

The nematic phase transition in electronic liquids, driven by Coulomb interactions, represents a new class of strongly correlated electronic ground states. We studied suspended samples of bilayer graphene, annealed so that it achieves very high quasiparticle mobilities (greater than 106 square centimers per volt-second). Bilayer graphene is a truly two-dimensional material with complex chiral electronic spectra, and the high quality of our samples allowed us to observe strong spectrum reconstructions and electron topological transitions that can be attributed to a nematic phase transition and a decrease in rotational symmetry. These results are especially surprising because no interaction effects have been observed so far in bilayer graphene in the absence of an applied magnetic field.

Original language	English
Pages (from-to)	860-863
Number of pages	4
Journal	Science
Volume	333
Issue number	6044
DOIs	https://doi.org/10.1126/science.1208683
Publication status	Published - 12 Aug 2011

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title = "Interaction-driven spectrum reconstruction in bilayer graphene",

abstract = "The nematic phase transition in electronic liquids, driven by Coulomb interactions, represents a new class of strongly correlated electronic ground states. We studied suspended samples of bilayer graphene, annealed so that it achieves very high quasiparticle mobilities (greater than 106 square centimers per volt-second). Bilayer graphene is a truly two-dimensional material with complex chiral electronic spectra, and the high quality of our samples allowed us to observe strong spectrum reconstructions and electron topological transitions that can be attributed to a nematic phase transition and a decrease in rotational symmetry. These results are especially surprising because no interaction effects have been observed so far in bilayer graphene in the absence of an applied magnetic field.",

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T1 - Interaction-driven spectrum reconstruction in bilayer graphene

AU - Mayorov, A.S.

AU - Elias, D.C.

AU - Mucha-Kruczynski, Marcin

AU - Gorbachev, R.V.

AU - Tudorovskiy, T.

AU - Zhukov, A.

AU - Morozov, S.V.

AU - Katsnelson, M.I.

AU - Fal'ko, V.I.

AU - Geim, A.K.

AU - Novoselov, K.S.

PY - 2011/8/12

Y1 - 2011/8/12

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AB - The nematic phase transition in electronic liquids, driven by Coulomb interactions, represents a new class of strongly correlated electronic ground states. We studied suspended samples of bilayer graphene, annealed so that it achieves very high quasiparticle mobilities (greater than 106 square centimers per volt-second). Bilayer graphene is a truly two-dimensional material with complex chiral electronic spectra, and the high quality of our samples allowed us to observe strong spectrum reconstructions and electron topological transitions that can be attributed to a nematic phase transition and a decrease in rotational symmetry. These results are especially surprising because no interaction effects have been observed so far in bilayer graphene in the absence of an applied magnetic field.

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