Physics – Condensed Matter
Scientific paper
1994-03-14
Physics
Condensed Matter
15 pages (three encapsulated postscript files appended at the end), latex
Scientific paper
The electron-phonon interaction corresponding to the Holstein model (with Coulomb repulsion) is simulated in infinite dimensions using a novel quantum Monte Carlo algorithm. The thermodynamic phase diagram includes commensurate charge-density-wave phases, incommensurate charge-density-wave phases, and superconductivity. The crossover from a weak-coupling picture (where pairs both form and condense at $T_c$) to a strong-coupling picture (where preformed pairs condense at $T_c$) is illustrated with the onset of a double-well structure in the effective phonon potential.
Freericks James K.
Jarrell Mark
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