Abstract 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.
Received: 08 October 2000
Revised: 14 January 2001
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 19804009).
Cite this article:
Wang Zhuang-bing (汪壮兵), Wu Fu-li (吴福理), Chen Qing-hu (陈庆虎), Jiao Zheng-kuan (焦正宽) VARIATIONAL CALCULATION ON GROUND-STATE ENERGY OF BOUND POLARONS IN PARABOLIC QUANTUM WIRES 2001 Chinese Physics 10 437
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