Phonon and magnon mediated d-wave superconductivity in cuprates

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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Date:1996
Main Authors: Sherman, A., Schreiber, M.
Format: Article
Language:English
Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 1996
Series:Физика низких температур
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Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты"
Online Access:https://nasplib.isofts.kiev.ua/handle/123456789/176058
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Journal Title:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Cite this: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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spelling nasplib_isofts_kiev_ua-123456789-1760582025-02-09T12:32:58Z Phonon and magnon mediated d-wave superconductivity in cuprates Sherman, A. Schreiber, M. Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты" 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 1996 Article 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 en Физика низких температур application/pdf Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
topic Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты"
Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты"
spellingShingle Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты"
Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты"
Sherman, A.
Schreiber, M.
Phonon and magnon mediated d-wave superconductivity in cuprates
Физика низких температур
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
format Article
author Sherman, A.
Schreiber, M.
author_facet Sherman, A.
Schreiber, M.
author_sort Sherman, A.
title Phonon and magnon mediated d-wave superconductivity in cuprates
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
publisher Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
publishDate 1996
topic_facet Специальный выпуск Международная конференция "Сверхпроводимость. Физические аспекты"
url https://nasplib.isofts.kiev.ua/handle/123456789/176058
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.
series Физика низких температур
work_keys_str_mv AT shermana phononandmagnonmediateddwavesuperconductivityincuprates
AT schreiberm phononandmagnonmediateddwavesuperconductivityincuprates
first_indexed 2025-11-26T00:08:47Z
last_indexed 2025-11-26T00:08:47Z
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