### Valley symmetry breaking in bilayer graphene: a test to the minimal modelValley symmetry breaking in bilayer graphene: a test to the minimal model

Access Restriction
Open

 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