| Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors. | |
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MedLine Citation:
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PMID: 11484045 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Coupling between electrons and phonons (lattice vibrations) drives the formation of the electron pairs responsible for conventional superconductivity. The lack of direct evidence for electron-phonon coupling in the electron dynamics of the high-transition-temperature superconductors has driven an intensive search for an alternative mechanism. A coupling of an electron with a phonon would result in an abrupt change of its velocity and scattering rate near the phonon energy. Here we use angle-resolved photoemission spectroscopy to probe electron dynamics-velocity and scattering rate-for three different families of copper oxide superconductors. We see in all of these materials an abrupt change of electron velocity at 50-80 meV, which we cannot explain by any known process other than to invoke coupling with the phonons associated with the movement of the oxygen atoms. This suggests that electron-phonon coupling strongly influences the electron dynamics in the high-temperature superconductors, and must therefore be included in any microscopic theory of superconductivity. |
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Authors:
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A Lanzara; P V Bogdanov; X J Zhou; S A Kellar; D L Feng; E D Lu; T Yoshida; H Eisaki; A Fujimori; K Kishio; J I Shimoyama; T Noda; S Uchida; Z Hussain; Z X Shen |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Nature Volume: 412 ISSN: 0028-0836 ISO Abbreviation: Nature Publication Date: 2001 Aug |
Date Detail:
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Created Date: 2001-08-02 Completed Date: 2001-08-23 Revised Date: 2003-10-31 |
Medline Journal Info:
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Nlm Unique ID: 0410462 Medline TA: Nature Country: England |
Other Details:
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Languages: eng Pagination: 510-4 Citation Subset: - |
Affiliation:
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Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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