Diverse magnetic quantization in bilayer silicene

ORAL

Abstract

The generalized tight-binding model is developed to investigate the rich and unique electronic properties of AB-bt bilayer silicene under the uniform perpendicular electric and magnetic fields. The first pair of conduction and valence bands, with an observable energy gap, possesses the unusual energy dispersions. Each group of conduction/valence Landau levels (LLs) is further classified into four subgroups; that is, there exist the sublattice- and spin-dominated LL subgroups. The magnetic-field-dependent LL energy spectra exhibit the irregular behavior corresponding to the critical points of band structure. Moreover, the electric field can create the frequent LL anti-crossings. The main features of LLs are revealed as many van Hove singularities in density of states. The feature-rich magnetic quantization directly reflects the geometric symmetries, the intralayer and interlayer atomic interactions, the spin-orbital couplings, and the field effects.

–

Presenters

  • Thi Nga Do

    • Dept. of Physics, National Kaohsiung Normal University

Authors

  • Thi Nga Do

    • Dept. of Physics, National Kaohsiung Normal University

  • Godfrey Gumbs

    • Physics and Astronomy, Hunter college
    • Hunter college, CUNY
    • Physics and astronomy, Hunter College-City University of New York
    • Physics and Astronomy, Hunter College, CUNY
    • Department of Physics & Astronomy, Hunter College of CUNY
    • Hunter College, CUNY
    • Department of Physics and Astronomy, Hunter College of the City University of New York
    • Department of Physics and Astronomy, Hunter College, City University of New York

  • Danhong Huang

    • US Air Force Research Lab (AFRL/RVSWS)
    • Space Vehicles Directorate, Air Force Research Lab
    • Space Vehicles Directorate, US Air Force Research Lab
    • US Air Force Research Laboratory

  • Chih-Wei Chiu

    • Dept. of Physics, National Kaohsiung Normal University

  • Yu-Huang Chiu

    • Department of Applied Physics, National Pingtung University

  • Ming-Fa Lin

    • Department of Physics, National Cheng Kung University
    • Dept. of Physics, National Cheng Kung University