Optical spectra and intensities of graphene magnetic dot bound to a negatively charged Coulomb impurity

Journal Article · Mon Jul 28 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4891886· OSTI ID:22308536

Lee, C. M., E-mail: [e-mail], E-mail: [e-mail]; Chan, K. S., E-mail: [e-mail], E-mail: [e-mail] ^[1]; Shenzhen Research Institute, City University of Hong Kong, Shenzhen ^[2]

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1. Department of Physics and Materials Science and Center for Functional Photonics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong (China)
2. (China)

Employing numerical diagonalization, we study the optical properties of an electron in a monolayer-graphene magnetic dot bound to an off-center negatively charged Coulomb impurity based on the massless Dirac-Weyl model. Numerical results show that, since the electron-hole symmetry is broken by the Coulomb potential, the optical absorption spectra of the magnetic dot in the presence of a Coulomb impurity are different between the electron states and the hole states. Effects of both the magnetic field and the dot size on the absorption coefficient are presented as functions of the incident photon energies.

• OSTI ID: 22308536
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ABSORPTION SPECTRA
COULOMB FIELD
ELECTRONS
GRAPHENE
IMPURITIES
MAGNETIC FIELDS
OPTICAL PROPERTIES
PHOTONS
SIMULATION
SYMMETRY BREAKING