Feature-Rich Magnetic Quantization in Sliding Bilayer Graphenes

  • 黃 耀功

Student thesis: Master's Thesis

Abstract

The generalized tight-binding model based on the subenvelope functions of distinct sublattices is developed to investigate the magnetic quantization in sliding bilayer graphenes The relative shift of two graphene layers induces a dramatic transformation between the Dirac-cone structure and the parabolic band structure and thus leads to drastic changes of Landau levels in the spatial symmetry initial formation energy intergroup anti-crossing state degeneracy and semiconductor-metal transition There exist three kinds of LLs i e well-behaved perturbed and undefined LLs which are characterized by a specific mode a main mode plus side modes and a disordered mode respectively Such LLs are clearly revealed in diverse magneto-optical selection rules Specially the undefined LLs frequently exhibit intergroup anti-crossings in the field-dependent energy spectra and show a large number of absorption peaks without optical selection rules
Date of Award2014 Aug 13
Original languageEnglish
SupervisorMin-Fa Lin (Supervisor)

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