A note on the possible mechanisms of high-temperature superconductivity

E.G. Maksimov^a, O.V. Dolgov^a, b
^aLebedev Physical Institute, Russian Academy of Sciences, Leninsky prosp. 53, Moscow, 119991, Russian Federation
^bMax-Planck Institut für Festkörperforschung, Stuttgart, Germany

Possible mechanisms of high-temperature superconductivity are briefly discussed. In particular, a recent paper by P W Anderson on this problem is criticized as containing a number of incorrect and unfounded statements. One of these — that the static dielectric function ε(q, 0) cannot be negative — is discussed in detail, as is its consequence, a strong limit on the transition temperature T_c. Proofs are given that ε(q, 0) not only can but indeed must be negative in many stable systems, including most of the conventional metals. Various types of electron-electron interaction in superconducting cuprates are discussed. The role of the electron-phonon interaction in cuprates is highlighted.

PACS: 71.10.Ay, 71.15.Mb, 74.20.−z, 74.72.−h (all)
DOI: 10.1070/PU2007v050n09ABEH006213
URL: https://ufn.ru/en/articles/2007/9/c/
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000252639900003
Scopus

2-s2.0-38349019838
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2007PhyU...50..933M
Citation: Maksimov E G, Dolgov O V "A note on the possible mechanisms of high-temperature superconductivity" Phys. Usp. 50 933–937 (2007)

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Оригинал: Максимов Е Г, Долгов О В «О возможных механизмах высокотемпературной сверхпроводимости» УФН 177 983–988 (2007); DOI: 10.3367/UFNr.0177.200709c.0983

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