2009年12月
Valley Symmetry Breaking in Bilayer Graphene: A Test of the Minimal Model
PHYSICAL REVIEW LETTERS
- ,
- ,
- 巻
- 103
- 号
- 26
- 開始ページ
- 266804-1
- 終了ページ
- 4
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.103.266804
- 出版者・発行元
- AMER PHYSICAL SOC
Physical properties reflecting the valley asymmetry of Landau levels in a biased bilayer graphene under a magnetic field are discussed. Within the 4-band continuum model with a 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 nonsemiclassical de Haas-van Alphen effect where the reduction of the oscillation period to half cannot be accounted for through quasiclassical quantization of the orbits in reciprocal space.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevLett.103.266804
- ISSN : 0031-9007
- Web of Science ID : WOS:000273232200036