Anisotropy of the non-equilibrium quasiparticle dynamics in single crystals of YBa2Cu3O7−δ

Research paper by C.J. Stevens, P. Gay, D.C. Smith, C. Chen, J.F. Ryan

Indexed on: 01 Dec '99Published on: 01 Dec '99Published in: Journal of low temperature physics


We report for the first time, measurements of ultrafast transients from YBCO in which the contributions from a- and b-axis response are separately identified using polarised light. A new signal is observed for E∥a which has been obscured in all previous thin film experiments. Comparing the two contributions we find the new signal to be sensitive to Tcwhilst the signal for E∥b exhibits pseudogap behaviour.