EFFECT OF MULTIPLE PHONON BRANCHES ON THE PHASE TRANSITIONAL BEHAVIOR OF A TWO-DIMENSIONAL POLARON GAS
1995 ◽
Vol 09
(07)
◽
pp. 849-857
Keyword(s):
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.
Keyword(s):
2001 ◽
Vol 10
(1-3)
◽
pp. 22-26
◽
Keyword(s):
1974 ◽
Vol 32
(10)
◽
pp. 515-517
◽
Keyword(s):