Ya. G. Ponomarev, E. G. Maksimov, “Tunneling and Andreev spectroscopies of high-<nobr>$T_c$</nobr> superconductors”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2002, Volume 76, Issue 6,Pages <nobr>455

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SCIENTIFIC SUMMARIES

Tunneling and Andreev spectroscopies of high-$T_c$ superconductors

Ya. G. Ponomarev^a, E. G. Maksimov^b

^a M. V. Lomonosov Moscow State University, Faculty of Physics
^b P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow

Abstract: unneling spectroscopic studies of high-temperature superconductors (HTSC) are overviewed. It is demonstrated, in particular, that the superconducting gaps determined from Andreev reflections and tunneling current-voltage characteristics coincide at all doping levels. Facts are presented evidencing the strong electron-phonon interaction in the HTSC systems. The nature of the so-called pseudogap, which is observed in some tunneling experiments, is briefly discussed.

PACS: 74.20.Rp, 74.50.+r, 74.72.-h, 74.80.Dm

Received: 09.08.2002