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Author Nakamura, Masaaki ♦ Castro, Eduardo V. ♦ Dora, Balazs
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2009-10-19
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword Condensed Matter - Mesoscale and Nanoscale Physics ♦ Condensed Matter - Strongly Correlated Electrons ♦ physics:cond-mat
Abstract Physical properties reflecting valley asymmetry of Landau levels in a biased bilayer graphene under magnetic field are discussed. Within the $4-$band continuum model with Hartree-corrected self-consistent gap and finite damping factor we predict the appearance of anomalous steps in quantized Hall conductivity due to the degeneracy lifting of Landau levels. Moreover, the valley symmetry breaking effect appears as a non-semiclassical de Haas-van Alphen effect where the reduction of the oscillation period to half cannot be accounted for through quasi-classical quantization of the orbits in reciprocal space, still valley degenerate.
Description Reference: Phys. Rev. Lett. 103, 266804 (2009)
Educational Use Research
Learning Resource Type Article
Page Count 4


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