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Magnetic field effect on state energies and transition frequency of a strong-coupling polaron in an anisotropic quantum dot

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Abstract

By employing a variational method of the Pekar-type, which has different variational parameters in the x–y plane and the z-direction, we study the ground and the first excited state energies and transition frequency between the ground and the first excited states of a strong-coupling polaron in an anisotropic quantum dot (AQD) under an applied magnetic field along the z-direction. The effects of the magnetic field and the electron–phonon coupling strength are taken into account. It is found that the ground and the first excited state energies and the transition frequency are increasing functions of the external applied magnetic field. The ground state and the first excited state energies are decreasing functions, whereas transition frequency is an increasing function of the electron–phonon coupling strength. We find two ways of tuning the state energies and the transition frequency: by adjusting (1) the magnetic field and (2) the electron–phonon coupling strength.

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Acknowledgement

This project was supported by the National Science Foundation of China under Grant No. 10964005.

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Authors and Affiliations

  1. Department of Basic Sciences, University of Informational Science and Technology of Beijing, Beijing, 100101, China

    WEI XIAO

  2. College of Physics and Electronic Information, Inner Mongolia National University, Tongliao, 028043, China

    JING-LIN XIAO

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  1. WEI XIAO
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  2. JING-LIN XIAO
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Correspondence to JING-LIN XIAO.

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XIAO, W., XIAO, JL. Magnetic field effect on state energies and transition frequency of a strong-coupling polaron in an anisotropic quantum dot. Pramana - J Phys 81, 865–871 (2013). https://doi.org/10.1007/s12043-013-0614-4

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  • DOI: https://doi.org/10.1007/s12043-013-0614-4

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