Unusual oxygen isotope effects in cuprates?

John F. Douglas, Hideaki Iwasawa, Zhe Sun, Alexei V. Fedorov, Motoyuki Ishikado, Tomohiko Saitoh, Hiroshi Eisaki, Hiroshi Bando, Takeshi Iwase, Akihiro Ino, Masashi Arita, Kenya Shimada, Hirofumi Namatame, Masaki Taniguchi, Takahiko Masui, Setsuko Tajima, Kazuhiro Fujita, Shin-ichi Uchida, Yoshihiro Aiura () and Daniel S. Dessau
Additional contact information
John F. Douglas: University of Colorado
Hideaki Iwasawa: Tokyo University of Science
Zhe Sun: University of Colorado
Alexei V. Fedorov: Advanced Light Source, Lawrence Berkeley Lab
Motoyuki Ishikado: University of Tokyo
Tomohiko Saitoh: Tokyo University of Science
Hiroshi Eisaki: National Institute of Advanced Industrial Science and Technology
Hiroshi Bando: National Institute of Advanced Industrial Science and Technology
Takeshi Iwase: National Institute of Advanced Industrial Science and Technology
Akihiro Ino: Graduate School of Science, Hiroshima University
Masashi Arita: Hiroshima Synchrotron Radiation Center, Hiroshima University
Kenya Shimada: Hiroshima Synchrotron Radiation Center, Hiroshima University
Hirofumi Namatame: Hiroshima Synchrotron Radiation Center, Hiroshima University
Masaki Taniguchi: Graduate School of Science, Hiroshima University
Takahiko Masui: Osaka University, 1-1 Machikaneyama
Setsuko Tajima: Osaka University, 1-1 Machikaneyama
Kazuhiro Fujita: University of Tokyo
Shin-ichi Uchida: University of Tokyo
Yoshihiro Aiura: National Institute of Advanced Industrial Science and Technology
Daniel S. Dessau: University of Colorado

Nature, 2007, vol. 446, issue 7133, E5-E5

Abstract: Abstract Arising from: G.-H. Gweon et al. Nature 430, 187–190 (2004) The possibility that a pairing boson might act as the 'glue' to bind electrons into a Cooper pair in superconductors with a high critical temperature (Tc) is being actively pursued in condensed-matter physics. Gweon et al.1 claim that there is a large and unusual oxygen-isotope effect on the electronic structure, indicating that phonons have a special importance in high-temperature superconductors. However, we are unable to detect this unusual oxygen-isotope effect in new data collected under almost identical material and experimental conditions. Our findings point towards a more conventional influence of phonons in these materials.

Date: 2007
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DOI: 10.1038/nature05738

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