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Local Structure and Superconductivity in Tl2Ba2CuOy Studied by Extended X-Ray Absorption Fine Structure

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Advances in Superconductivity V

Abstract

Local structure of Tl2Ba2CuOy (T12201) has been investigated by extended X-ray absorption fine structure (EXAFS) on the Cu K-edge. The EXAFS spectra of the high-Tc sample with Tc=70 K shows the splitting of in-plane Cu-O bondlength. The splitting increases with decreasing temperature well above Tc and abruptly decreases at Tc. On the other hand, no splitting was observed in that of non- superconductor samples. This fact demonstrates the existence of the local distortion in the CuO2 plane well above Tc relating with the superconductivity. No apparent anomalies are observed in the apical-oxygen contribution in the vicinity of Tc.

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Author information

Authors and Affiliations

  1. Electrotechnical Laboratory, Tsukuba, Ibaraki, 305, Japan

    Hirotaka Yamaguchi & Hiroyuki Oyanagi

  2. Hachioji Research Center, Casio Computer Co. Ltd., Hachioji, Tokyo, 192, Japan

    Satoru Nakajima

  3. The Institute of Physical and Chemical Research, Wako, Saitama, 351-01, Japan

    Yuji Kuwahara

  4. Institute for Materials Research, Tohoku University, Sendai, 908, Japan

    Yasuhiko Syono

Authors
  1. Hirotaka Yamaguchi
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  2. Satoru Nakajima
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  3. Yuji Kuwahara
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  4. Hiroyuki Oyanagi
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  5. Yasuhiko Syono
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Editor information

Editors and Affiliations

  1. Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611, Japan

    Yoshichika Bando

  2. Superconductivity Research Laboratory, ISTEC, Koto-ku, Tokyo, 135, Japan

    Hisao Yamauchi

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© 1993 Springer-Verlag Tokyo

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Yamaguchi, H., Nakajima, S., Kuwahara, Y., Oyanagi, H., Syono, Y. (1993). Local Structure and Superconductivity in Tl2Ba2CuOy Studied by Extended X-Ray Absorption Fine Structure. In: Bando, Y., Yamauchi, H. (eds) Advances in Superconductivity V. Springer, Tokyo. https://doi.org/10.1007/978-4-431-68305-6_14

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  • DOI: https://doi.org/10.1007/978-4-431-68305-6_14

  • Publisher Name: Springer, Tokyo

  • Print ISBN: 978-4-431-68307-0

  • Online ISBN: 978-4-431-68305-6

  • eBook Packages: Springer Book Archive

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