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Influence of Temperature and Spin–Orbit Interaction on the Effective Mass of Polaron in an Anisotropic Quantum Dot

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Abstract

Using the linear combination operator method and variational technique improved by Tokuda, we obtain the expression of the effective mass of a strong coupled polaron in an anisotropic quantum dot. Due to the spin–orbit interaction, the effective mass of the polaron splits into two branches. The dependence of effective mass on temperature, electron–phonon coupling strength, transverse and longitudinal confinement lengths, and velocity is discussed by numerical calculation. The theoretical results indicate that the effective mass of the polaron is an increasing function of temperature and electron–phonon coupling strength, but a decreasing function of transverse confinement length, longitudinal confinement length, and velocity. The absolute value of spin splitting effective mass increases with the increase of temperature and spin–orbit coupling parameter, but decreases with the increase of transverse confinement length, longitudinal confinement length, and velocity. Due to the heavy hole characteristic, the spin splitting effective mass is negative.

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Authors and Affiliations

  1. College of Physics and Electromechanics, Longyan University, Fujian, China

    Shu-Ping Shan, Wei-Dong Zou, Ren-Zhong Zhuang, Hui-Ye Qiu & Rong-Xin Chen

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  1. Shu-Ping Shan
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  2. Wei-Dong Zou
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  3. Ren-Zhong Zhuang
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  4. Hui-Ye Qiu
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  5. Rong-Xin Chen
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Contributions

Shu-Ping Shan, Wei-Dong Zou, Ren-Zhong Zhuang, and Hui-Ye Qiu wrote the main manuscript text and Rong-Xin Chen prepared figures 1-8. All authors reviewed the manuscript.

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Correspondence to Shu-Ping Shan.

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Shan, SP., Zou, WD., Zhuang, RZ. et al. Influence of Temperature and Spin–Orbit Interaction on the Effective Mass of Polaron in an Anisotropic Quantum Dot. J Low Temp Phys 214, 21–31 (2024). https://doi.org/10.1007/s10909-023-03010-z

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  • DOI: https://doi.org/10.1007/s10909-023-03010-z

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