Perturbative expansion using a variational phonon basis for the Holstein model
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Perturbative expansion using a variational phonon basis for the Holstein model
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| Creator |
Chatterjee, J
Das, A N Choudhury, Pranab |
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| Subject |
Processing Science
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| Description |
A simple variational displacement phonon basis. obtained through the modified Lang-Firsov (MLF) transformation, is proposed to study the Holstein model. This phonon basis contains only one variational parameter, but capable of describing lattice distortions at distant sites from the charge carrier. A perturbation method based on this MLF basis is employed to calculate the single-electron ground-state energy and the dispersion of the polaronic band. The ground-state (k = 0) energy obtained up to the second-order perturbation within this approach agrees well with the available numerical results for the entire range of coupling strength. (C) 2003 Elsevier Science Ltd. All rights reserved.
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| Publisher |
Pergamon-Elsevier
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| Date |
2003-04
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/835/1/pranab'03.pdf
Chatterjee, J and Das, A N and Choudhury, Pranab (2003) Perturbative expansion using a variational phonon basis for the Holstein model. Solid State Communications, 126 (3). pp. 113-118. ISSN 0038-1098 |
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| Relation |
http://cgcri.csircentral.net/835/
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