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Current-voltage relation for superconducting d-wave junctions

Magnus Hurd

DOI 10.1103/PhysRevB.55.R11993 · Physical Review B

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Abstract

We calculate the current-voltage (I-V) relation for planar superconducting d-wave junctions for both arbitrary transmission of the junction and arbitrary orientation of the d-wave superconductors. The midgap states (MGS) present at interfaces/surfaces of a d-wave superconductor influence the I-V relation. In some arrangements we find considerable negative differential conductance and lower threshold voltage for nonzero current due to resonant conduction through MGS.

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