Temperature dependence of the electron self-energy in a polar-crystal slab |
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| Institution: | 1. Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD;2. Office of Research Nursing, National Cancer Institute, National Institutes of Health, Bethesda, MD;3. National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD;4. Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD;5. Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD;1. School of Physics and Materials Science, Anhui University, Hefei 230601, PR China;2. Department of Physics and Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China;3. Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen 518063, PR China;4. State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, PR China;1. Department of Electrical and Computer Engineering, Center for Materials for Information Technology, The University of Alabama, Tuscaloosa, AL 35487, USA;2. Department of Chemistry, Texas A&M University-Kingsville, Kingsville, TX 78363, USA |
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| Abstract: | In this paper we investigate temperature dependence of the electron self-energy in the polar-crystal slab using Green-function method. We introduce Q2D free Green's function for the first time. Numerical calculations of the electron self-energy using GaAs as an example are performed. The results show that the electron self-energy is a decreasing function of temperature. In calculation, we consider the effect of the excited states on the electron self-energy and find the ground-state energy be about 11% lower than that of bulk polaron. The results also imply that the high excited states pay a larger contribution to the electron self-energy with increasing temperature. |
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