中国物理B ›› 2001, Vol. 10 ›› Issue (5): 437-442.doi: 10.1088/1009-1963/10/5/315
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
汪壮兵, 吴福理, 陈庆虎, 焦正宽
Wang Zhuang-bing (汪壮兵), Wu Fu-li (吴福理), Chen Qing-hu (陈庆虎), Jiao Zheng-kuan (焦正宽)
摘要: Within the framework of Feynman path-integral variational theory, we calculate the ground-state energy of a polaron in parabolic quantum wires in the presence of a Coulomb potential. It is shown that the polaronic correction to the ground-state energy is more sensitive to the electron-phonon coupling constant than the Coulomb binding parameter, and it increases monotonically with decreasing effective wire radius. Moreover, compared to the results obtained by Feynman Haken variational path-integral theory, we obtain better results within the Feynman path-integral variational approach (FV approach). Applying our calculation to several polar semiconductor quantum wires, we find that the polaronic correction can be considerably large.
中图分类号: (Polarons and electron-phonon interactions)