A theory of superconductivity in cuprates
A microscopic theory of superconducting pairing mediated by antiferromagnetic (AFM) exchange and spin-fluctuations is developed within the effective p − d Hubbard model for the CuO₂ plane. It is proved that retardation effects for AFM exchange interaction are unimportant and result in pairing of all...
Збережено в:
| Дата: | 2005 |
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| Автор: | |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2005
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/121059 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | A theory of superconductivity in cuprates / N.M. Plakida // Condensed Matter Physics. — 2005. — Т. 8, № 4(44). — С. 845–858. — Бібліогр.: 19 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | A microscopic theory of superconducting pairing mediated by antiferromagnetic (AFM) exchange and spin-fluctuations is developed within the effective p − d Hubbard model for the CuO₂ plane. It is proved that retardation effects for AFM exchange interaction are unimportant and result in pairing of all electrons in the conduction band and high Tc proportional to the Fermi energy. The spin-fluctuations caused by the kinematic interaction give an additional contribution to the d-wave pairing. Tc dependence on the hole concentration and lattice constants (or pressure) is studied. Small oxygen isotope shift of Tc is explained. The data are compared with the results for the t − J model. |
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