TY - JOUR
T1 - Andreev reflections in layered structures
T2 - Implications ifor high-Tc grain-boundary junctions
AU - Golubov, Alexander
AU - Tafuri, Francesco
PY - 2000
Y1 - 2000
N2 - Andreev reflection is investigated in layered anisotropic normal-metal–superconductor (N/S) systems in the case of an energy gap (Δ) in S not negligible with respect to the Fermi energy (EF), as it probably occurs with high critical temperature superconductors (HTSC’s). We find that in these limits retroreflectivity, which is a fundamental feature of Andreev reflection, is broken modifying sensitively transport across S/N interfaces. We discuss the consequences for supercurrents in HTSC Josephson junctions and for the midgap states in S-N contacts.
AB - Andreev reflection is investigated in layered anisotropic normal-metal–superconductor (N/S) systems in the case of an energy gap (Δ) in S not negligible with respect to the Fermi energy (EF), as it probably occurs with high critical temperature superconductors (HTSC’s). We find that in these limits retroreflectivity, which is a fundamental feature of Andreev reflection, is broken modifying sensitively transport across S/N interfaces. We discuss the consequences for supercurrents in HTSC Josephson junctions and for the midgap states in S-N contacts.
U2 - 10.1103/PhysRevB.62.15200
DO - 10.1103/PhysRevB.62.15200
M3 - Article
SN - 0163-1829
VL - 62
SP - 15200
EP - 15203
JO - Physical Review B (Condensed Matter and Materials Physics)
JF - Physical Review B (Condensed Matter and Materials Physics)
IS - 22
ER -