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Title: Dynamical Cooper pairing in nonequilibrium electron-phonon systems

In this paper, 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. Finally, 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.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4]
  1. Technical Univ. of Munich, Garching (Germany). Inst. for Advanced Study. Walter Schottky Inst. Dept. of Physics
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States). Inst. for Quantum Information and Matter
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  4. Harvard Univ., Cambridge, MA (United States). Dept. of Physics
Publication Date:
Grant/Contract Number:
AC02-06CH11357; DMR-1308435; DMR-1410435; 291763; KN 1254/1-1
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 21; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States); Technical Univ. of Munich, Garching (Germany)
Sponsoring Org:
USDOE Office of Science (SC); National Science Foundation (NSF); German Excellence Initiative (Germany); European Union FP7 (Belgium); German Research Foundation (DFG)
Contributing Orgs:
Harvard Univ., Cambridge, MA (United States)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; electron-phonon coupling; fermions; nonequilibrium statistical mechanics; optical transient phenomena; phonons; superconducting phase transition; nonlinear dynamics; statistical physics
OSTI Identifier:
1352663
Alternate Identifier(s):
OSTI ID: 1334849