Dynamical Cooper pairing in nonequilibrium electron-phonon systems

Michael Knap, Mehrtash Babadi, Gil Refael, Ivar Martin, and Eugene Demler
Phys. Rev. B 94, 214504 – Published 8 December 2016

Abstract

We analyze Cooper pairing instabilities in strongly driven electron-phonon systems. The light-induced nonequilibrium state of phonons results in a simultaneous increase of the superconducting coupling constant and the electron scattering. We demonstrate that the competition between these effects leads to an enhanced superconducting transition temperature in a broad range of parameters. Our results may explain the observed transient enhancement of superconductivity in several classes of materials upon irradiation with high intensity pulses of terahertz light, and may pave new ways for engineering high-temperature light-induced superconducting states.

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  • Received 20 July 2016
  • Revised 10 October 2016

DOI:https://doi.org/10.1103/PhysRevB.94.214504

©2016 American Physical Society

Physics Subject Headings (PhySH)

Statistical Physics & ThermodynamicsNonlinear DynamicsAtomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Michael Knap1, Mehrtash Babadi2, Gil Refael2, Ivar Martin3, and Eugene Demler4

  • 1Department of Physics, Walter Schottky Institute, and Institute for Advanced Study, Technical University of Munich, 85748 Garching, Germany
  • 2Institute for Quantum Information and Matter, Caltech, Pasadena, California 91125, USA
  • 3Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 4Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

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Issue

Vol. 94, Iss. 21 — 1 December 2016

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