Polaronic effect on a bound polaron

作     者：阮永红 吴福理 陈庆虎 

作者机构：Department of Physics Zhejiang University Hangzhou China 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报A辑(应用物理与工程)(英文版))

年 卷 期：2002年第3卷第5期

页      面：75-79页

核心收录：

学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 07[理学] 070205[理学-凝聚态物理] 0703[理学-化学] 0702[理学-物理学] 

基　　金：(No .1980 40 0 9)supportedbytheNationalNaturalScienceFoundationofChina 

主　　题：Bound polaron Quantum well Quantum wire Quantum dot Ground state energy 

摘      要：Feynman variational path integral theory was used to obtain the ground state energy of a polaron in a quantum well in the presence of a Coulomb potential for arbitrary values of the electron phonon coupling constant α . Numerical and analytical results showed that the energy shift was more sensitive to α than to the Coulomb binding parameter ( β ) and increased with the decrease of effective quantum well width l Z . It was interesting that due to the electronic confinement in the quasi 2D (quantum well) structures, the lower bound of the strong coupling regime was shifted to smaller values of α . Comparison of the polaron in the quantum well with that in the quantum wire or dot showed that the polaronic effect strengthened with decrease of the confinement dimension.