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/ 000252639900003 2-s2.0-38349019838 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) BibTexBibNote ® (generic)BibNote ® (RIS)Medline RefWorks RT Journal T1 A note on the possible mechanisms of high-temperature superconductivity A1 Maksimov,E.G. A1 Dolgov,O.V. PB Physics-Uspekhi PY 2007 FD 10 Sep, 2007 JF Physics-Uspekhi JO Phys. Usp. VO 50 IS 9 SP 933-937 DO 10.1070/PU2007v050n09ABEH006213 LK https://ufn.ru/en/articles/2007/9/c/ Оригинал: Максимов Е Г, Долгов О В «О возможных механизмах высокотемпературной сверхпроводимости» УФН 177 983–988 (2007); DOI: 10.3367/UFNr.0177.200709c.0983