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Your search keyword '"Chiu, Yu-Huang"' showing total 3 results
Start Over Author "Chiu, Yu-Huang" Topic landau levels
3 results on '"Chiu, Yu-Huang"'

1. Beating oscillations of magneto-optical spectra in simple hexagonal graphite.

Author

Chen, Rong-Bin, Chiu, Yu-Huang, and Lin, Ming-Fa

Subjects
*GRAPHITE crystallography, *MAGNETOOPTICS, *LANDAU levels, *OSCILLATIONS, *LOSS functions (Statistics)
Abstract

The magneto-optical properties of simple hexagonal graphite exhibit rich beating oscillations, which are dominated by the field strength and photon energy. The former has a strong effect on the intensity, the energy range of the beating and the number of groups, and the latter modulates the total group numbers of the oscillation structures. The single-particle and collective excitations are simultaneously presented in the magnetoreflectance spectra and can be precisely distinguished. For the loss function and reflectance, the beating pattern of the first group displays stronger intensities and broader energy range than other groups. Simple hexagonal graphite possesses unique magneto-optical characteristics that can serve to identify other bulk graphites. [ABSTRACT FROM AUTHOR]

Published
2015
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2. Gate-voltage-dependent Landau levels in AA-stacked bilayer graphene

Author

Tsai, Sing-Jyun, Chiu, Yu-Huang, Ho, Yen-Hung, and Lin, Ming-Fa

Subjects
*LANDAU levels, *GRAPHENE, *ELECTRIC potential, *MAGNETIC fields, *SEMICONDUCTORS, *BAND gaps
Abstract

Abstract: The effects of gate voltage on the Landau levels (LLs) of the AA-stacked bilayer graphene are investigated by the Peierls tight-binding model. A uniform perpendicular magnetic field () produces two groups of LLs. can raise the threshold LL energies, increase the quantum numbers of the LLs nearest to the chemical potential, and modify the LL spacing. An energy gap is induced by , and it has an oscillatory dependence on and . There exist semiconductor-semimetal transitions at certain critical gate voltages. Some carriers are transferred between similar sublattices on the two different layers. On the other hand, the main features of the Landau wave functions remain unchanged. [Copyright &y& Elsevier]

Published
2012
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3. Exact diagonalization of Landau levels in Bernal graphite

Author

Wang, Jei, Chiu, Yu-Huang, Ho, Yen-Hung, Li, To-Sing, and Lin, Ming-Fa

Subjects
*LANDAU levels, *GRAPHITE, *ELECTRONIC structure, *HAMILTONIAN systems, *NUMERICAL calculations, *MATRICES (Mathematics), *MATHEMATICAL models
Abstract

Abstract: The magneto-electronic structure of Bernal graphite is derived by the Peierls tight-binding model. Seven important atomic interactions are taken into account and the corresponding Hamiltonian matrix is rearranged as a band-like form for efficient calculation. The results derived from this exact diagonalization method demonstrate that interlayer interactions play remarkable roles in Landau level structures. [Copyright &y& Elsevier]

Published
2011
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