EFFECT OF MULTIPLE PHONON BRANCHES ON THE PHASE TRANSITIONAL BEHAVIOR OF A TWO-DIMENSIONAL POLARON GAS
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Published:1995-03-30
Issue:07
Volume:09
Page:849-857
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ISSN:0217-9792
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Container-title:International Journal of Modern Physics B
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language:en
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Short-container-title:Int. J. Mod. Phys. B
Author:
MUKHOPADHYAY SOMA1,
CHATTERJEE ASHOK1
Affiliation:
1. School of Physics, University of Hyderabad, Hyderabad -500 134, India
Abstract
Using an all-coupling variational method and the random phase approximation, it is shown that a two-dimensional polaron gas exhibiting no localization-delocalization transition with a single optical phonon branch may undergo such a transition in the presence of an additional phonon branch. However, if the system already shows a transition, with a single phonon branch, then the effect of an additional branch is just to enhance the low-mobility self-trapped phase of the polaron.
Publisher
World Scientific Pub Co Pte Lt
Subject
Condensed Matter Physics,Statistical and Nonlinear Physics