On the s-type superconductivity in heavy-fermion compounds


Тип публикации: статья из журнала

Год издания: 2006

Идентификатор DOI: 10.1134/S0021364006160119

Аннотация: The amplitude of scattering of f electrons has been calculated for the periodic Anderson model in the strong-correlation limit (U = infinity) in the Cooper channel. From the condition of the existence of a pole of this amplitude, an equation is derived for determining the critical temperature (T-c) of the transition to the superconПоказать полностьюducting phase with the s symmetry of the order parameter. The temperature T-c as a function of the electron density and hybridization parameter has been calculated by self-consistently solving the system of equations. The region of the existence of the superconducting phase is found to adjoin the region of the existence of the unsaturated ferromagnetic state and does not overlap it. The results can be used to describe the transition to the superconducting phase with the s symmetry of the order parameter in heavy-fermion skutterudite LaFe4P12. In this case, the inclusion of the scattering of fermions by spin fluctuations turns out to be substantial enough to obtain T-c values close to the experimental data.

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Выпуск журнала: Vol. 84, Is. 4

Номера страниц: 217-221

ISSN журнала: 00213640

Место издания: NEW YORK



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