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.

*This material is based upon work supported by the Air Force Office of Scientific Research (AFOSR) under award number FA2386-18-1-0120. We acknowledges the support from the AFOSR and from the DoD Lab-University Collaborative Initiative (LUCI) Program and the support from the Air Force Research Laboratory (AFRL) through Grant \#12530960.

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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