A note on the possible mechanisms of high-temperature superconductivity

Maksimov, E. G.; Dolgov, O. V.

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A note on the possible mechanisms of high-temperature superconductivity

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Dolgov, O. V.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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Maksimov, E. G., & Dolgov, O. V. (2007). A note on the possible mechanisms of high-temperature superconductivity. Physics - Uspekhi, 50(9), 933-937.

Cite as: https://hdl.handle.net/21.11116/0000-000F-0169-A

Abstract

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 epsilon(q, 0) cannot he negative - is discussed in detail, as is its consequence, a strong limit on the transition temperature T-c. Proofs are given that epsilon(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.