Evidence for two coupled subsystems in the superconducting state of La2_xSrxCuO4

Academic Article


  • We used a pump-probe technique to measure the transient change of optical reflectivity of both La2_xSrxCuO4, of various dopings, and slightly underdoped YBa2Cu3O7_x and NdBa2Cu3O7_x thin films. For the La2_xSrxCuO4 films, our data demonstrate the coexistence, in the superconducting state, of two coupled subsystems with different relaxation times and different contributions to the optical reflectivity. One subsystem is associated with the superconducting phase. By contrast, the data from YBa2Cu3O7_x and NdBa2Cu3O7_x shows that the coupling between the two subsystems is weak or absent.
  • Authors

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    Author List

  • Rast S; Schneider ML; Onellion M; Zeng XH; Si W; Xi XX; Abrecht M; Ariosa D; Pavuna D; Ren YH
  • Start Page

  • 2145051
  • End Page

  • 2145055
  • Volume

  • 64
  • Issue

  • 21