Size-effects in the Density of States in NS and SNS junctions

Abstract

The quasiparticle local density of states (LDOS) is studied in clean NS and SNS junctions with increasing transverse size, from quasi-one-dimensional to three-dimensional. It is shown that finite transverse dimensions are related to pronounced effects in the LDOS, such as fast oscillations superimposed on the quasiparticle interference oscillations (for NS) and additional peaks in the bound state spectrum in the subgap region (for SNS). Also, the validity of the Andreev approximation is discussed. It turns out to be an acceptable approximation in all situations tested.

9 pages, RevTex, 5 figures, accepted in Phys. Rev. B

References in corpus (1)

• Quantum Transport in Semiconductor Nanostructures

Cited by in corpus (5)

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• Andreev Bound States and Self-Consistent Gap Functions for SNS and SNSNS Systems
• Local density of states in clean two-dimensional superconductor--normal metal--superconductor heterostructures
• Andreev states, supercurrents and interface effects in clean SN multilayers
• Coherent electronic transport through a superconducting film