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Oxygen isotope effect in Bi2Sr2Can1CunO2n+4+δ (n=1,2,3) single crystals

Xiao-Jia Chen, Bing Liang, Clemens Ulrich, Cheng-Tian Lin, Viktor V. Struzhkin, Zhigang Wu, Russell J. Hemley, Ho-kwang Mao, and Hai-Qing Lin
Phys. Rev. B 76, 140502(R) – Published 9 October 2007

Abstract

We report measurements of the oxygen isotope effect in Bi2Sr2Can1CunO2n+4+δ (n=1,2,3) single crystals. For optimally doped materials the isotope exponent is found to decrease with increasing the number of CuO2 layers in a manner of inversely correlating with the superconducting transition temperature in this homologous family. This behavior is in contrast to the general belief that the isotope effect can be negligible for the optimally doped cuprates. Our results highlight the important role played by phonons and interlayer coupling in the high-temperature superconductivity.

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  • Received 28 August 2007

DOI:https://doi.org/10.1103/PhysRevB.76.140502

©2007 American Physical Society

Authors & Affiliations

Xiao-Jia Chen1,2,3, Bing Liang3, Clemens Ulrich3, Cheng-Tian Lin3, Viktor V. Struzhkin1, Zhigang Wu1, Russell J. Hemley1, Ho-kwang Mao1, and Hai-Qing Lin4

  • 1Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA
  • 2School of Physics, South China University of Technology, Guangzhou 510641, China
  • 3Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany
  • 4Department of Physics, The Chinese University of Hong Kong, Hong Kong, China

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Issue

Vol. 76, Iss. 14 — 1 October 2007

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