c-axis charge dynamics in oxygen deficient (110) YBa2Cu3O7-δ films

X. G. Qiu, H. Koinuma, M. Iwasaki, T. Itoh, A. K. Sarin Kumar, M. Kawasaki, E. Saitoh, Y. Tokura, K. Takehana, G. Kido, Y. Segawa

Research output: Contribution to journalArticlepeer-review


In-plane c-axis aligned (110) YBa2Cu3O7-δ thin films on (110) SrTiO3 substrates have been successfully fabricated by pulsed laser deposition, using the self-template method. The oxygen deficiency of the films is controlled in situ by adjusting the annealing oxygen partial pressure Po2. Electronic transport and c-axis far-infrared reflectivity measurements have been conducted on these thin films. It is revealed that in the normal state the carriers are confined in the CuO planes and that their transport across the c-axis is incoherent. A pseudogap develops in the normal state at temperatures well above Tc and it persists in the superconducting state. Upon decreasing the temperature below the critical transition temperature Tc, coherence is built up for the carrier transport along the c-axis and a reflectivity edge associated with the Josephson plasma is observed.

Original languageEnglish
Pages (from-to)305-309
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number1-4
Publication statusPublished - 2001 Sep


  • Far-infrared reflectivity
  • Josephson plasma
  • Pseudogap

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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