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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2002, Vol. 3 Issue (5): 574-578    DOI: 10.1631/jzus.2002.0574
Physics, Mathematics and Earth Science     
Polaronic effect on a bound polaron
RUAN Yong-hong, WU Fu-li, CHEN Qing-hu
Department of Physics, Zhejiang University, Hangzhou 310027, China
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Abstract  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 lZ. 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.

Key wordsBound polaron      Quantum well      Quantum wire      Quantum dot      Ground-state energy     
Received: 08 October 2001     
CLC:  O469  
  O488  
Cite this article:

RUAN Yong-hong, WU Fu-li, CHEN Qing-hu. Polaronic effect on a bound polaron. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2002, 3(5): 574-578.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2002.0574     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2002/V3/I5/574

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