Phase-breaking effects in superconducting heterostructures

Mikhail Belogolovskii

doi:10.1103/PhysRevB.67.100503

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Phase-breaking effects in superconducting heterostructures

Mikhail Belogolovskii

DOI 10.1103/PhysRevB.67.100503 · Physical Review B

T1

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Abstract

We present a theoretical analysis of a zero-temperature charge transport in a double-barrier structure formed by normal and superconducting electrodes with a partially dephasing mesoscopic region between two insulating layers. A scattering theory approach permits us to investigate a crossover from phase-coherent to sequential carrier transmission caused by inelastic phase-randomizing events. For a weakly transmitting junction, we derive a simple expression describing their effect on the superconducting tunneling density of states. For moderate-strength barriers, numerically simulated conductance-versus-voltage spectra exhibit a double-peaked structure in the case of s-wave superconductors and a dramatic reduction of a zero-bias maximum for d-wave pairing.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
LaBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown