Polarization and Aharonov-Bohm oscillations in quantum-ring magnetoexcitons

Ulloa, Sergio E; Shahbazyan, Tigran V

doi:10.1103/PhysRevB.72.125327

Title: Polarization and Aharonov-Bohm oscillations in quantum-ring magnetoexcitons

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Abstract

We study interaction and radial polarization effects on the absorption spectrum of neutral bound magnetoexcitons confined in quantum-ring structures. We show that the size and orientation of the exciton's dipole moment, as well as the interaction screening, play important roles in the Aharonov-Bohm (AB) oscillations. In particular, the excitonic absorption peaks display AB oscillations both in position and amplitude for weak electron-hole interaction and large radial polarization. The presence of impurity scattering induces anticrossings in the exciton spectrum, leading to a modulation in the absorption strength. These properties could be used in experimental investigations of the effect in semiconductor quantum-ring structures.

Authors:

Ulloa, Sergio E ^[1]; Shahbazyan, Tigran V ^[2]

Department of Physics and Astronomy, Nanoscale and Quantum Phenomena Institute, Ohio University, Athens, Ohio 45701-2979 (United States)
Department of Physics and Computational Center for Molecular Structure and Interactions, Jackson State University, Jackson, Mississippi 39217 (United States)

Publication Date:: Thu Sep 15 00:00:00 EDT 2005

OSTI Identifier:: 20719544

Resource Type:: Journal Article

Journal Name:: Physical Review. B, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 72; Journal Issue: 12; Other Information: DOI: 10.1103/PhysRevB.72.125327; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; ABSORPTION SPECTRA; AHARONOV-BOHM EFFECT; AMPLITUDES; DIPOLE MOMENTS; EXCITED STATES; EXCITONS; HOLES; IMPURITIES; ORIENTATION; OSCILLATIONS; POLARIZATION; QUANTUM DOTS; SCATTERING; SEMICONDUCTOR MATERIALS

Citation Formats


                    Dias da Silva, Luis G.G.V., Ulloa, Sergio E, and Shahbazyan, Tigran V. Polarization and Aharonov-Bohm oscillations in quantum-ring magnetoexcitons.  United States: N. p., 2005. 
        Web.  doi:10.1103/PhysRevB.72.125327.

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                    Dias da Silva, Luis G.G.V., Ulloa, Sergio E, & Shahbazyan, Tigran V. Polarization and Aharonov-Bohm oscillations in quantum-ring magnetoexcitons.  United States.  https://doi.org/10.1103/PhysRevB.72.125327

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                    Dias da Silva, Luis G.G.V., Ulloa, Sergio E, and Shahbazyan, Tigran V. 2005.  
        "Polarization and Aharonov-Bohm oscillations in quantum-ring magnetoexcitons".  United States.  https://doi.org/10.1103/PhysRevB.72.125327.

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@article{osti_20719544,

  title        = {Polarization and Aharonov-Bohm oscillations in quantum-ring magnetoexcitons},

  author       = {Dias da Silva, Luis G.G.V. and Ulloa, Sergio E and Shahbazyan, Tigran V},

  abstractNote = {We study interaction and radial polarization effects on the absorption spectrum of neutral bound magnetoexcitons confined in quantum-ring structures. We show that the size and orientation of the exciton's dipole moment, as well as the interaction screening, play important roles in the Aharonov-Bohm (AB) oscillations. In particular, the excitonic absorption peaks display AB oscillations both in position and amplitude for weak electron-hole interaction and large radial polarization. The presence of impurity scattering induces anticrossings in the exciton spectrum, leading to a modulation in the absorption strength. These properties could be used in experimental investigations of the effect in semiconductor quantum-ring structures.},

  doi          = {10.1103/PhysRevB.72.125327},

  url          = {https://www.osti.gov/biblio/20719544},
  journal      = {Physical Review. B, Condensed Matter and Materials Physics},

  issn         = {1098-0121},

  number       = 12,

  volume       = 72,

  place        = {United States},

  year         = {Thu Sep 15 00:00:00 EDT 2005},

  month        = {Thu Sep 15 00:00:00 EDT 2005}

}

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https://doi.org/10.1103/PhysRevB.72.125327

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