Unusual oxygen isotope effects in cuprates?
2007; Nature Portfolio; Volume: 446; Issue: 7133 Linguagem: Inglês
10.1038/nature05738
ISSN1476-4687
AutoresJ. F. Douglas, Hideaki Iwasawa, Zhe Sun, А. В. Федоров, M. Ishikado, T. Saitoh, Hiroshi Eisaki, Hiroshi Bando, Takeshi Iwase, A. Ino, Masashi Arita, K. Shimada, H. Namatame, M. Taniguchi, T. Masui, S. Tajima, Kazuhiro Fujita, Shin-ichi Uchida, Y. Aiura, D. S. Dessau,
Tópico(s)Advanced Condensed Matter Physics
ResumoThe 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.
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