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20 April 2024

» pubmed » pmid17361133

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Superconductors: 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 ; Daniel S Dessau ;
Date:	15 Mar 2007
Journal:	Nature, 446 (7133), E5
Abstract:	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 (T(c)) is being actively pursued in condensed-matter physics. Gweon et al. 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.
Source:	PubMed, pmid17361133 doi: 10.1038/nature05738
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