Simulation of the electron-phonon interaction in infinite dimensions

1994/03/14 by J. K. Freericks, Freericks, J. K., Mark Jarrell +1
Materials Science · Physics and Astronomy · #Advanced Chemical Physics Studies #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #cond-mat

paper · pdf · doi:10.48550/arxiv.cond-mat/9403048

15 pages (three encapsulated postscript files appended at the end), latex

arxiv created 1994/03/14 · arxiv updated 2009/11/30

Abstract

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.

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