Quasiparticle spectrum of a type-II superconductor in a high magnetic field with randomly pinned vortices
P. D. Sacramento
DOI 10.1103/PhysRevB.59.8436 · Physical Review B
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Abstract
We show that gapless superconductivity of a strongly type-II superconductor in a high magnetic field prevails in the presence of disorder, suggesting a topological nature. We calculate the density of states of the Bogoliubov–de Gennes quasiparticles for a two-dimensional inhomogeneous system in both cases of weak and strong disorder. In the limit of very weak disorder, the effect is very small and the density of states is not appreciably changed. As the disorder increases, the density of states at low energies increases and the ratio of the low-energy density of states to its maximum increases significantly.
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