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Pis'ma v Zh. Èksper. Teoret. Fiz., 2001, Volume 74, Issue 7, Pages 435–439 (Mi jetpl4231)  

CONDENSED MATTER

Theory of high-$T_c$ superconductivity based on the fermion-condensation quantum phase transition

M. Ya. Amusiaab, S. A. Artamonovc, V. R. Shaginyanc

a Racah Institute of Physics, Hebrew University
b Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg
c B. P. Konstantinov Petersburg Nuclear Physics Institute, Russian Academy of Sciences

Abstract: A theory of high temperature superconductivity based on the combination of the fermion-condensation quantum phase transition and the conventional theory of superconductivity is presented. This theory describes maximum values of the superconducting gap which can be as big as $\Delta_1\sim 0.1\varepsilon_F$, with $\varepsilon_F$ being the Fermi level. We show that the critical temperature $2T_c\simeq\Delta_1$. If there exists the pseudogap above $T_c$ then $2T^*\simeq\Delta_1$, and $T^*$ is the temperature at which the pseudogap vanishes. A discontinuity in the specific heat at $T_c$ is calculated. The transition from conventional superconductors to high-$T_c$ ones as a function of the doping level is investigated. The single-particle excitations and their lineshape are also considered.

Full text: PDF file (164 kB)

English version:
Journal of Experimental and Theoretical Physics Letters, 2001, 74:7, 396–400

Document Type: Article
PACS: 71.27.+a, 74.20.Fg, 74.25.Jb
Received: 03.09.2001
Language: English

Citation: M. Ya. Amusia, S. A. Artamonov, V. R. Shaginyan, “Theory of high-$T_c$ superconductivity based on the fermion-condensation quantum phase transition”, Pis'ma v Zh. Èksper. Teoret. Fiz., 74:7 (2001), 435–439; JETP Letters, 74:7 (2001), 396–400

Citation in format AMSBIB
\Bibitem{AmuArtSha01}
\by M.~Ya.~Amusia, S.~A.~Artamonov, V.~R.~Shaginyan
\paper Theory of high-$T_c$ superconductivity based on the fermion-condensation quantum phase transition
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2001
\vol 74
\issue 7
\pages 435--439
\mathnet{http://mi.mathnet.ru/jetpl4231}
\transl
\jour JETP Letters
\yr 2001
\vol 74
\issue 7
\pages 396--400
\crossref{https://doi.org/10.1134/1.1427130}
\scopus{http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-0039486695}


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