6533b82afe1ef96bd128b40e
RESEARCH PRODUCT
Generalization of Blonder-Tinkham-Klapwijk theory to particle-hole mixing boundary conditions: \pi-shift and conductance dips
M. CatapanoF. RomeoR. CitroF. Giubileosubject
Condensed Matter::SuperconductivityCondensed Matter - Superconductivitydescription
We generalize the Blonder-Tinkham-Klapwijk theory considering non-diagonal boundary conditions in the Bogoliubov-de Gennes scattering problem, to describe anomalous conductance features often reported for normal-metal/superconductor contacts. We calculate the differential conductance spectra showing that conductance dips, not expected in the standard formulation, are explained in terms of phase \pi-shift, between the bulk and the interface order parameter, possibly induced by a localized magnetic moment. A discretized model is used to give quantitative evaluation of the physical conditions, namely the polarization and transparency of the interface, needed to realize the phase gradient.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-02-27 |