Polaronic effects in asymmetric quantum wire: An all-copuling variational approach

Date
2006-05
Authors
Krishna, P. M.
Mukhopadhyay, S.
Chatterjee, A.
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Source Title
Solid State Communications
Print ISSN
0038-1098
Electronic ISSN
1879-2766
Publisher
Elsevier
Volume
138
Issue
11
Pages
285 - 289
Language
English
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Abstract

An all-coupling variational calculation based on Lee-Low-Pines-Huybrechts (LLPH) theory is performed to study the ground state and the first excited state in an asymmetric polar semiconductor quantum wire that is valid for the entire range of the electron-phonon coupling constant and arbitrary confinement length. It is shown that the polaronic effects are very important and size dependent, if the effective width of the wire is reduced below a certain length scale. It is also shown that asymmetry in a quantum wire can be used as an extra parameter to increase the stability of the polaron. Finally the theory is applied to a realistic CdS quantum wire.

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