Competition between superconductivity and charge density wave order in the Holstein model

ORAL

Abstract

A common theme in the study of superconductivity in strongly correlated materials is the competition between superconductivity (SC) and a charge density wave (CDW). While superconductivity in these materials may involve more exotic pairing mechanisms such as spin fluctuations, the basic electron-phonon problem remains of broad interest in the study of superconductivity, exhibits both SC and CDW phases, and has no exact analytic solution. This motivates our study of SC/CDW competition in the 2D Holstein model using numerically exact determinant quantum Monte Carlo. We describe the optimal conditions for superconductivity, the transition from the weak-coupling Migdal-Eliashberg regime to the strong-coupling polaronic regime, and the behavior of the charge density wave ordering wave vector as a function of the dimensionless electron-phonon coupling strength and the adiabatic ratio of the phonon frequency to the Fermi energy.

–

Presenters

  • Benjamin Nosarzewski

    • Stanford Univ
    • Physics, Stanford University

Authors

  • Benjamin Nosarzewski

    • Stanford Univ
    • Physics, Stanford University

  • Edwin Huang

    • Stanford Univ
    • SLAC National Accelerator Laboratory
    • Physics, Stanford University
    • Stanford University

  • Ilya Esterlis

    • Stanford Univ
    • Physics, Stanford University

  • Phillip Dee

    • Univ of Tennessee

  • Brian Moritz

    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab
    • SLAC and Stanford University
    • SLAC National Accelerator Laboratory
    • Stanford Institute for Materials and Energy Sciences, SLAC National Laboratory
    • SIMIS, Stanford University
    • Physics, Stanford University
    • Stanford Univ
    • SIMES, SLAC and Stanford University

  • Steven Johnston

    • Univ. of Tennessee
    • Univ of Tennessee
    • Physics, Univ of Tennessee, Knoxville
    • Physics and Astronomy, University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee
    • Physics, Univ. of Tennessee
    • physics and astronomy, University of Tennessee
    • Department of Physics and Astronomy, Univ of Tennessee, Knoxville

  • Steven Kivelson

    • Stanford University
    • Stanford Univ
    • Physics, Stanford University

  • Thomas Devereaux

    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory
    • Stanford Univ
    • SLAC and Stanford University
    • SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab
    • Stanford Institute for Materials and Energy Sciences, SLAC National Laboratory
    • Stanford University
    • SIMIS, Stanford University
    • Physics, Stanford University
    • SLAC National Lab and Stanford University
    • SIMES, SLAC and Stanford University