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Charged excitons in parabolic quantum-well wires under magnetic filed

Liu Jian Zhang Hong Zhang Chun-Yuan Zhang Hui-Liang

Charged excitons in parabolic quantum-well wires under magnetic filed

Liu Jian, Zhang Hong, Zhang Chun-Yuan, Zhang Hui-Liang
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  • Received Date:  07 September 2010
  • Accepted Date:  25 October 2010
  • Published Online:  15 July 2011

Charged excitons in parabolic quantum-well wires under magnetic filed

  • 1. (1)College of Physical Science and Information Engineering, Hebei Normal University, Shijiazhuang 050016, China; (2)College of Science, Hebei University of Engineering, Handan 056038, China

Abstract: The binding energies of the charged excitons(negative X- and positive X+ excitons) are calculated using the finite-difference method within the quasi-one-dimensional effective potential model. The effects due to the magnetic filed and quantum confinements on the binding energy are analyzed, and the following results are obtained:(1) relative electron and hole harmonic oscillator confinement each have a strong effect on the stablity of charged excitons, the binding energy of X+ is not always larger than that of X-, e.g., due to the increase of the hole harmonic oscillator length, leading to the crossing of X+ and X- lines as recently observed experimentally;(2) the magnetic field leads to an increase of the binding energy, and the magnetic field dependence of the binding energy is related to the harmonic oscillator length.

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