The role of the Coulomb interaction in the formation of superconducting and pseudogap states in cuprate metal-oxides
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
The role of the Coulomb interaction in the formation of superconducting and pseudogap states in cuprate metal-oxides
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| Creator |
Pashitskii, E.A.
Pentegov, V.I. |
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| Subject |
Pseudogap
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| Description |
It is shown that the key role in the mechanism of high-Tc superconductivity in the layered cuprate metal-oxides with anisotropic quasi-two-dimensional electronic spectrum and d-wave symmetry of the superconducting order parameter is played by the retarded screened Coulomb interaction and many-body correlations. We argue that the pseudogap observed in these materials is the anisotropic dielectric gap, which appears due to the electron-hole pairing on the flat portions of the Fermi surface in the vicinity of the extended saddle points in the quasiparticle spectrum. This gap coexists with the superconducting gap and is partially suppressed by scattering of current carriers on the charged point defects. The suppression of dielectric gap is analogous to the suppression of superconducting gap by magnetic impurities in «gapless» superconductors. The complete destruction of the pseudogap by charged impurities is assumed to increase Tc significantly. |
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| Date |
2017-06-11T12:13:44Z
2017-06-11T12:13:44Z 2006 |
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| Type |
Article
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| Identifier |
The role of the Coulomb interaction in the formation of
superconducting and pseudogap states
in cuprate metal-oxides / E.A. Pashitskii, V.I. Pentegov // Физика низких температур. — 2006. — Т. 32, № 4-5. — С. 596–601. — Бібліогр.: 15 назв. — англ.
0132-6414 PACS: 74.72.–h http://dspace.nbuv.gov.ua/handle/123456789/120194 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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