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Temperature Effects on the First Excited State of the Polaron in an Asymmetric Quantum Pseudodot Under Magnetic Field

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Abstract

Using the variational method of the Pekar type, we investigate the first excited state energy of the polaron in an asymmetric quantum pseudodot under the magnetic field. Temperature effects on the polaron are calculated by employing the quantum statistical theory, and the influences of the chemical potential, the zero point of pseudo-harmonic potential (PHP), the cyclotron frequency, the electron–phonon coupling strength and the transverse and the longitudinal effective confinement lengths are taken into account. The results show that the first excited state energy decreases (increases) when the temperature is increased at lower (higher) temperature region. And it is an increasing function of the chemical potential, the zero point of PHP, the cyclotron frequency and the electron–phonon coupling strength. Simultaneously, it is a decreasing one of the transverse and the longitudinal effective confinement lengths.

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Authors and Affiliations

  1. School of Physics and Physical Engineering, Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Qufu Normal University, Qufu, 273165, China

    Ying-Jie Chen & Pei-Yu Zhang

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  1. Ying-Jie Chen
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  2. Pei-Yu Zhang
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Correspondence to Ying-Jie Chen.

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Chen, YJ., Zhang, PY. Temperature Effects on the First Excited State of the Polaron in an Asymmetric Quantum Pseudodot Under Magnetic Field. J Low Temp Phys 194, 262–272 (2019). https://doi.org/10.1007/s10909-018-2098-6

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  • DOI: https://doi.org/10.1007/s10909-018-2098-6

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