Strong compensation of the quantum fluctuation corrections in a clean superconductor
D. V. Livanov, G. Savona, A. A. Varlamov
DOI 10.1103/PhysRevB.62.8675 · Physical Review B
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Abstract
The theory of fluctuation conductivity for an arbitrary impurity concentration including the ultraclean limit [Tτ≫Tc/(T−Tc)] is developed. It is demonstrated that the formal divergency of the fluctuation density of states contribution obtained previously for the clean case is removed by the correct treatment of the nonlocal ballistic electron scattering. We show that in the ultraclean limit the density-of-states quantum corrections are canceled by the Maki-Thompson term and only classical paraconductivity remains.
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