Si-doped Defect in Monolayer Graphene: Magnetic Quantization

ORAL

Abstract

We explore the rich and unique magnetic quantization of Si-doped graphene defect systems for various concentrations and configurations using the generalized tight-binding model. This model takes into account simultaneously the non-uniform bond lengths, site energies and hopping integrals, as well as a uniform perpendicular magnetic field . The magnetic quantized Landau levels (LLs) could be classified into four different groups based on the probability distributions and oscillation modes. The magneto-optical selection rules, reflecting the main characteristics of LLs, cover Δn = |nc-nv| = 0 and 1. These rules for inter-LL excitations arise from the non-equivalence or equivalence of the and sublattices in a supercell. The spectral intensity can be controlled by oscillator strength using a canonical momentum as well as by density of states using concentration and distribution of doped Si atoms.

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Presenters

  • Pohsin Shih

    Dept. of Physics, National Cheng Kung University

Authors

  • Pohsin Shih

    Dept. of Physics, National Cheng Kung University

  • Thi Nga Do

    Dept. of Physics, National Cheng Kung University

  • Bor-Luen Huang

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

  • Godfrey Gumbs

    Hunter College of the City University of New York, Department of Physics and Astronomy, Hunter college, Department of Physics & Astronomy, Hunter College of CUNY, New York, NY, USA, Hunter College, City University of New York, New York, NY, Physics and Astronomy, Hunter College/CUNY, Department of Physics and Astronomy, Hunter College of the City University of New York, Hunter College, CUNY, Physics Department, Hunter College/CUNY

  • Danhong Huang

    Air Force Research Lab - Kirtland, Physics, University of New Mexico, Air Force Research Labs., Kirtland Airforce Base, Air Force Research Laboratory, Albuquerque, NM, Advanced E/O Space Sensors Group, Air Force Research Laboratory, US Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, Air Force Research Laboratory

  • Ming-Fa Lin

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