Two Components in Femtosecond Optical Response of Y0.7Pr0.3Ba2Cu3O7-δ Thin Films in Superconducting State

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Copyright (c) 2000 The Japan Society of Applied Physics
, , Citation Shigeki Nashima Shigeki Nashima et al 2000 Jpn. J. Appl. Phys. 39 L663 DOI 10.1143/JJAP.39.L663

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Author affiliations

1 Research Center for Superconducting Materials and Electronics, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan

2 CREST, Japan Science and Technology Corporation,

3 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan

4 Institut für Festkörperphysik,

5 Friedrich-Schiller-Universität Jena, Helmholtzweg 5, D-07743 Jena,

6 Germany

Dates

  1. Received 13 March 2000
  2. Accepted 12 May 2000

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Abstract

We studied the optical response of Y0.7Pr0.3Ba2Cu3O7-δ (YPBCO) thin films by means of a femtosecond time-resolved pump-probe method, and found that its response quite differs significantly from that of YBa2Cu3O7-δ (YBCO) thin films. It is revealed that there are two components in the transient reflectivity change ΔR(t)/R of the YPBCO thin film in the superconducting state. The temperature dependence of ΔR(t)/R suggests that the one component originates from the photoexcitation of superconducting layers and the other originates from that of normal layers. The origin of these two components is discussed in relation to the electronic structure of YPBCO.

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10.1143/JJAP.39.L663