Phonon and magnon mediated d-wave superconductivity in cuprates
We use the Eliashberg formalism for calculating Tc in the 2D t-J model supplemented by an interaction with fulJy-symmetric apex-oxygen vibrations. It is shown that in this model holes form an anomalous 2D Fermi liquid with a Fermi surface which is also two-dimensional in a certain range of hole conc...
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| Опубліковано в: : | Физика низких температур |
|---|---|
| Дата: | 1996 |
| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
1996
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/176058 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Phonon and magnon mediated d-wave superconductivity in cuprates / A. Sherman, M. Schreiber // Физика низких температур. — 1996. — Т. 22, № 5. — С. 503-505. — Бібліогр.: 12 назв. — англ. |
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nasplib_isofts_kiev_ua-123456789-176058 |
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Sherman, A. Schreiber, M. 2021-02-03T14:45:04Z 2021-02-03T14:45:04Z 1996 Phonon and magnon mediated d-wave superconductivity in cuprates / A. Sherman, M. Schreiber // Физика низких температур. — 1996. — Т. 22, № 5. — С. 503-505. — Бібліогр.: 12 назв. — англ. 0132-6414 https://nasplib.isofts.kiev.ua/handle/123456789/176058 We use the Eliashberg formalism for calculating Tc in the 2D t-J model supplemented by an interaction with fulJy-symmetric apex-oxygen vibrations. It is shown that in this model holes form an anomalous 2D Fermi liquid with a Fermi surface which is also two-dimensional in a certain range of hole concentrations x. This Fermi surface is a part of a large nearly flat region around the boundaries of the magnetic Brillouin zone. Extended saddle points, analogous to those observed in angle-resolved photoemission spectra, form the main part of this region. It produces a pronounced maximum in the density of states near the Fermi level. However, in spite of this favorable condition for superconductivity, created by the hole-magnon interaction, we found this interaction alone to be unable to yield high Tc . Only together with a moderate hole-phonon interaction does it lead to d-wave superconductivity at temperatures and hole concentrations observed in cuprates. High Tc are connected with a large density of states in the nearly flat region, a conformity of the two interactions for the dx²-y² symmetry, and a high phonon frequency Ω. The obtained dependences of Tc on x and on Ω are in close agreement with observations in cuprates. Remove selected en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты" Phonon and magnon mediated d-wave superconductivity in cuprates Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Phonon and magnon mediated d-wave superconductivity in cuprates |
| spellingShingle |
Phonon and magnon mediated d-wave superconductivity in cuprates Sherman, A. Schreiber, M. Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты" |
| title_short |
Phonon and magnon mediated d-wave superconductivity in cuprates |
| title_full |
Phonon and magnon mediated d-wave superconductivity in cuprates |
| title_fullStr |
Phonon and magnon mediated d-wave superconductivity in cuprates |
| title_full_unstemmed |
Phonon and magnon mediated d-wave superconductivity in cuprates |
| title_sort |
phonon and magnon mediated d-wave superconductivity in cuprates |
| author |
Sherman, A. Schreiber, M. |
| author_facet |
Sherman, A. Schreiber, M. |
| topic |
Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты" |
| topic_facet |
Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты" |
| publishDate |
1996 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
We use the Eliashberg formalism for calculating Tc in the 2D t-J model supplemented by an interaction with fulJy-symmetric apex-oxygen vibrations. It is shown that in this model holes form an anomalous 2D Fermi liquid with a Fermi surface which is also two-dimensional in a certain range of hole concentrations x. This Fermi surface is a part of a large nearly flat region around the boundaries of the magnetic Brillouin zone. Extended saddle points, analogous to those observed in angle-resolved photoemission spectra, form the main part of this region. It produces a pronounced maximum in the density of states near the Fermi level. However, in spite of this favorable condition for superconductivity, created by the hole-magnon interaction, we found this interaction alone to be unable to yield high Tc . Only together with a moderate hole-phonon interaction does it lead to d-wave superconductivity at temperatures and hole concentrations observed in cuprates. High Tc are connected with a large density of states in the nearly flat region, a conformity of the two interactions for the dx²-y² symmetry, and a high phonon frequency Ω. The obtained dependences of Tc on x and on Ω are in close agreement with observations in cuprates.
Remove selected
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| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/176058 |
| fulltext |
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| citation_txt |
Phonon and magnon mediated d-wave superconductivity in cuprates / A. Sherman, M. Schreiber // Физика низких температур. — 1996. — Т. 22, № 5. — С. 503-505. — Бібліогр.: 12 назв. — англ. |
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2025-11-26T00:08:47Z |
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2025-11-26T00:08:47Z |
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