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Charge-density-wave and pairing susceptibilities in a two-dimensional electron-phonon model

Journal Article · · Physical Review Letters; (USA)
;  [1];  [2]
  1. Department of Physics, University of California, Santa Barbara, California 93106 (USA)
  2. Department of Physics, University of California, Davis, California 95616 (USA)
We present quantum Monte Carlo results for a two-dimensional electron-phonon model. At half filling, a Peierls--charge-density-wave (CDW) instability dominates the behavior of the system and suppresses superconductivity. The CDW structure factor scales with system size and is consistent with a finite-size Ising-like scaling analysis which we use to estimate {ital T}{sub {ital c}} for the Peierls-CDW transition. Away from half filling, the Monte Carlo calculations show superconducting pairing in an {ital s}-wave channel, with a peak in the pair field susceptibility near a region in which there are strong Peierls-CDW correlations.
DOE Contract Number:
FG03-85ER45197
OSTI ID:
5844836
Journal Information:
Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 66:6; ISSN PRLTA; ISSN 0031-9007
Country of Publication:
United States
Language:
English

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