Two-component dynamics of the order parameter of high temperature Bi2Sr2CaCu2O8+δ superconductors revealed by time-resolved Raman scattering

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Erscheinungsjahr:
2009
Medientyp:
Text
Schlagworte:
  • Superconductors (materials)
  • Superconducting materials
  • Amplitude mode
  • Superconductors (Materials)
  • Superconducting Materials
  • Superconductivity
  • Superconductors (materials)
  • Superconducting materials
  • Amplitude mode
  • Superconductors (Materials)
  • Superconducting Materials
  • Superconductivity
Beschreibung:
  • We study the dynamics of the superconducting order parameter in the high-Tc cuprate Bi2Sr2CaCu2O8+δ by employing a novel time-resolved pump-probe Raman experiment. We find two different coupling mechanisms that contribute equally to the pair-breaking peak. One coupling sets in very fast at 2 ps and relaxes slowly, while the other one is delayed and sets in roughly at 5 ps and relaxes fast. A model that couples holes through phonons is able to reproduce one part of the condensate dynamics; thus, we argue that hole-spin interactions are of importance as well. © 2009 The American Physical Society.
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  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/6a37f6d9-a5fd-457d-a2b6-3c36a1841024