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

Research output: Contribution to journalArticlepeer-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 languageEnglish
Pages (from-to)860-863
Number of pages4
JournalScience
Volume333
Issue number6044
DOIs
Publication statusPublished - 12 Aug 2011

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