Abstract
We study the dynamics of the superconducting order parameter in the high- cuprate 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.
- Received 2 December 2008
DOI:https://doi.org/10.1103/PhysRevLett.102.177004
©2009 American Physical Society