Ruderman-Kittel-Kasuya-Yosida interaction in dirty superconductors
Hocine Bahlouli
DOI 10.1103/PhysRevB.44.5328 · Physical Review B
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Abstract
With the approximation that the energy gap is position independent, the static spin susceptibility in the superconducting state is completely determined by the normal-state Green functions. At low concentrations of nonmagnetic impurities, it is shown, by use of semiclassical approximations, that the usual type of Ruderman-Kittel-Kasuya-Yosida interaction acquires an additional random-phase shift. In systems where superconductivity and magnetism coexist such an effect will cause strong disorder in the magnetic phase akin to a spin-glass-like phase.
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