Andreev reflection eigenvalue density in mesoscopic conductors
P. Samuelsson, W. Belzig, Yu. V. Nazarov
TL;DR
This paper analyzes the distribution of Andreev reflection eigenvalues in mesoscopic conductors to understand resonant electron-hole transport channels, using a versatile circuit-theory-like method applicable to various systems.
Contribution
It introduces a novel method to evaluate the energy-dependent Andreev reflection eigenvalue density in mesoscopic conductors.
Findings
Eigenvalue density reveals formation of resonant transport channels
Method applied successfully to diffusive wires and double tunnel junctions
Provides insights into transport properties of normal-superconducting systems
Abstract
The energy-dependent Andreev reflection eigenvalues determine the transport properties of normal-superconducting systems. We evaluate the eigenvalue density to get an insight into formation of resonant electron-hole transport channels. The circuit-theory-like method developed can be applied to any generic mesoscopic conductor or combinations thereof. We present the results for experimentally relevant cases of a diffusive wire and a double tunnel junction.
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