From the current literature

The energy gap in the electron excitation spectrum of oxide superconductors

Analysis of results of investigations of the energy gap $\Delta$ in oxide high-$T_c$ superconductors by the methods of the tunnel effect, electron photoemission, IR absorption, Raman scattering of light, and others, indicates satisfactory agreement of results obtained by different methods. For all the oxide superconductors with $T_c\ge$ 30 K the ratio $2\Delta/kT_c$ = 5--6 is significantly greater than the value predicted by the BCS theory. The deviations of the experimental data near the edge and the bottom of the gap from the values that follow from the traditional model for the distribution in energy of the excitations are within the limits of accuracy of the measurements. The data obtained do not contradict the ideas concerning the electron-phonon mechanism of superconductivity in the oxide superconductors that have been investigated.

PACS: 74.25.Jb, 74.50.+r, 74.20.Fg, 74.72.Dn, 71.18.+y, 74.25.Gz (all)
DOI: 10.1070/PU1990v033n09ABEH002645
Citation: Zavaritskii N V "The energy gap in the electron excitation spectrum of oxide superconductors" Sov. Phys. Usp. 33 (9) 775–791 (1990)
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Оригинал: Заварицкий Н В «Энергетическая щель в спектре возбуждений оксидных сверхпроводников» УФН 160 (9) 177–206 (1990); DOI: 10.3367/UFNr.0160.199009e.0177

References (96) Cited by (11) Similar articles (16) ↓

  1. E.G. Maksimov, S.Yu. Savrasov “Photoemission spectroscopy of high-Tc superconductors33 (9) 763–774 (1990)
  2. A.M. Gabovich, D.P. Moiseev “Metal oxide superconductor BaPb1-xBixO3: unusual properties and new applications29 1135–1150 (1986)
  3. V.A. Moskalenko, M.E. Palistrant, V.M. Vakalyuk “High-temperature superconductivity and the characteristics of the electronic energy spectrum34 (8) 717–728 (1991)
  4. L.A. Fal’kovskii “Electron scattering of light in superconductors33 (4) 296–298 (1990)
  5. I.I. Mazin “Electronic structure of high-temperature superconductors in the normal state32 469–472 (1989)
  6. V.M. Svistunov, M.A. Belogolovskii, A.I. D’yachenko “Vacuum tunneling microscopy and spectroscopy31 86–89 (1988)
  7. N.E. Alekseevskii, D.I. Khomskii “Heavy-fermion superconductors28 1136–1143 (1985)
  8. A.I. Golovashkin “Superconductors with unusual properties and possibilities of increasing the critical temperature29 199–209 (1986)
  9. K.K. Likharev “True quantum-mechanical macroscopic effects in weak superconductivity26 87–95 (1983)
  10. V.L. Sedov “Positronium in a cavity in a high-Tc superconductor52 687–694 (2009)
  11. V.V. Burdyuzha “Megamasers31 763–771 (1988)
  12. B.M. Smirnov “Aerogels30 420–432 (1987)
  13. Yu.Kh. Vekilov, V.D. Verner, M.B. Samsonova “Electron structure of surfaces of nontransition metals30 172–192 (1987)
  14. V.A. Karmanov “Anomalous nuclear fragments26 998–1005 (1983)
  15. V.F. Mukhanov “The double quasar 0957+561 A, B: a gravitational lens?24 331–333 (1981)
  16. V.L. Kuznetsov “Free-electron lasers22 934–938 (1979)

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