The influences of electric field and temperature on state energies of a strong-coupling polaron in an asymmetric Gaussian potential quantum well |
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Authors: | Xin-Jun Ma Jing-Lin Xiao |
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Institution: | 1. State Key Laboratory for Superhard Materials, Jilin University, Changchun 130012, China;2. Institute of Condensed Matter Physics, Inner Mongolia University for Nationalities, Tongliao 028043, China |
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Abstract: | We investigate the electric field effect on the ground state (GS), the first-excited state (FES) and the excitation energies of a strong-coupled polaron in an asymmetric Gaussian potential (AGP) quantum well (QW) by using a variational method of the Pekar type (VMPT). By employing the quantum statistics theory (QST), we also study the temperature effects on the state energies (SE). It is found that the SE of polaron are an increasing function of temperature. The polaron's SE are decreasing functions of electric field, but the excitation energy is an increasing one. |
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Keywords: | Asymmetric Gaussian potential Quantum wells Polaron Quantum statistics theory Electric field Temperature |
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