Mechanism for heavy-fermion superconductivity

Lal, R. ; Joshi, S. K. (1990) Mechanism for heavy-fermion superconductivity Physical Review B, 41 (4). pp. 1894-1903. ISSN 0163-1829

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A method has been developed to obtain an effective interaction between heavy quasiparticles that exist in heavy-fermion systems by combining the effects of the Coulomb interactions and the electron-phonon interactions that act among various constituents (heavy quasiparticles, light quasiparticles, phonons, non-f atoms) of the system. The effective interaction is expressed in terms of microscopic parameters of the heavy-fermion systems. The role of the new effective interaction in determining superconducting order in heavy-fermion systems at low temperatures has been clarified. It is found that an appropriate strength of the new interaction leads to p-wave superconductivity. Values of the superconducting transition temperature calculated by using the new interaction for different heavy-fermion systems are in good agreement with the experimental values of the superconducting transition temperature for reasonable magnitudes of quasiparticle bandwidths. General features of the new interaction have been discussed.

Item Type:Article
Source:Copyright of this article belongs to 10.1103/PhysRevB.41.1894.
ID Code:14428
Deposited On:12 Nov 2010 09:22
Last Modified:03 Jun 2011 11:06

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