The Interplay of Phonon and Magnetic Mechanism of Pairing in Strongly Correlated Electron System of High-T-c Cuprates

Описание

Тип публикации: статья из журнала (материалы конференций, опубликованные в журналах)

Конференция: International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-7); Beijing, PEOPLES R CHINA; Beijing, PEOPLES R CHINA

Год издания: 2010

Идентификатор DOI: 10.1007/s10948-009-0633-z

Ключевые слова: High-T-c superconductivity, Strong correlated electron systems, Mechanisms of superconducting pairing, High-T c superconductivity, Ab initio, Buckling mode, Correlated electron systems, Critical temperatures, Cuprates, Fitting parameters, High-T, Isotope effect, Low energies, Magnetic mechanisms, Order of magnitude, Phonon mode, Strongly correlated electron system, Strongly correlated electrons, Superconducting pairing, Superconductivity mechanism, Type theory, Buckling, Copper compounds, Electrons, Isotopes, Magnetic materials, Phonons, Superconductivity, Superconducting magnets

Аннотация: We consider magnetic mechanism of superconducting pairing in the effective low energy t - t' - t '' - J* model with all parameters calculated ab initio. Interaction of strongly correlated electrons with different phonon modes is also incorporated. In a BCS type theory, the d(x2-y2) gap is given by a sum of magnetic and phonon contrПоказать полностьюibutions. The main contribution to the only fitting parameter G is determined by a competition of the breathing and buckling modes. Fitting the parameter G from the isotope effect, we obtain that magnetic and phonon contributions to the critical temperature T-c work together and are of the same order of magnitude.

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Издание

Журнал: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM

Выпуск журнала: Vol. 23, Is. 5

Номера страниц: 733-736

ISSN журнала: 15571939

Место издания: NEW YORK

Издатель: SPRINGER

Авторы

  • Ovchinnikov S.G. (Siberian Federal University)
  • Shneyder E.I. (Reshetnev Siberian State Aerospace University)

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