Superconductivity-induced Anderson localization
D. E. Katsanos, S. N. Evangelou, C. J. Lambert
DOI 10.1103/PhysRevB.58.2442 · Physical Review B
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Abstract
We have studied the effect of a random superconducting order parameter on the localization of quasiparticles, by numerical finite-size scaling of the Bogoliubov–de Gennes tight-binding Hamiltonian. Anderson localization is obtained in d=2 and a mobility edge where the states localize is observed in d=3. The critical behavior and localization exponent are universal within error bars both for real and complex random order parameter. Experimentally these results imply a suppression of the electronic contribution to thermal transport from states above the bulk energy gap.
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