Spin fluctuation processes in the problem of s-wave superconducting phase of the heavy-fermion intermetallides

Описание

Тип публикации: статья из журнала

Год издания: 2010

Идентификатор DOI: 10.1088/1742-6596/200/1/012030

Ключевые слова: Anomalous component, Critical points, Critical temperatures, Heavy-fermion, Hubbard operators, Kinematic mechanism, One-loop approximation, Periodic Anderson model, Self-consistent equations, Skutterudites, Strong electron correlations, Superconducting phase, Superconducting phase transitions, Green's function, Mathematical operators, Phase diagrams, Shear waves, Spin fluctuations, Superconductivity, Phase transitions

Аннотация: In the framework of the periodic Anderson model in the limit of strong electron correlations a theory of s-wave superconductivity (this phase has been recently discovered in the skutterudite LaFe4P12) has been developed. The theory is based on kinematic mechanism, provided that the spin fluctuation processes (SFP) are taken into acПоказать полностьюcount.To obtain the self-consistent equations for the superconducting phase the diagram technique for Hubbard operators has been used. The exact representations of normal and anomalous Green's functions in terms of normal and anomalous components of mass and strength operators have been obtained. A set of integral equations for superconducting phase was deduced with the assumption that SFP have been accounted for. In the solution of these equations normal and anomalous components of the mass and strength operators have been calculated in the one-loop approximation. Computation has revealed that SFP result in substantial decreasing of critical temperature Tc and shifting the concentration critical point of the superconducting phase transition. © 2010 IOP Publishing Ltd.

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Издание

Журнал: International Conference on Magnetism, ICM 2009 (26 July 2009 through 31 July 2009, Karlsruhe

Выпуск журнала: Vol. 200, Is. SECTION 1

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