TY - JOUR
T1 - Charge transport through superconductor/Anderson-insulator interfaces
AU - Frydman, Aviad
AU - Ovadyahu, Zvi
PY - 1997
Y1 - 1997
N2 - We report on a study of charge transport through superconductor-insulator-superconductor and normal metal-insulator-superconductor structures (SIS and NIS junctions, respectively) where the insulator is of the Anderson type. Devices which are characterized by a junction resistance larger than 10 kΩ show behavior which is typical of Giaever tunnel junctions. In structures having smaller resistance, several peculiar features are observed. In the SIS junctions, Josephson coupling is detected over distances much larger then the typical insulator localization length. In addition, a series of resistance peaks appears at voltages of 2Δ/n, where Δ is the superconducting gap. The NIS Junctions exhibit a large resistance dip at subgap bias. We discuss possible interpretations of these findings and suggest that they may result from the presence of high transmission channels through the barrier region.
AB - We report on a study of charge transport through superconductor-insulator-superconductor and normal metal-insulator-superconductor structures (SIS and NIS junctions, respectively) where the insulator is of the Anderson type. Devices which are characterized by a junction resistance larger than 10 kΩ show behavior which is typical of Giaever tunnel junctions. In structures having smaller resistance, several peculiar features are observed. In the SIS junctions, Josephson coupling is detected over distances much larger then the typical insulator localization length. In addition, a series of resistance peaks appears at voltages of 2Δ/n, where Δ is the superconducting gap. The NIS Junctions exhibit a large resistance dip at subgap bias. We discuss possible interpretations of these findings and suggest that they may result from the presence of high transmission channels through the barrier region.
UR - http://www.scopus.com/inward/record.url?scp=0000338473&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.55.9047
DO - 10.1103/PhysRevB.55.9047
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AN - SCOPUS:0000338473
SN - 1098-0121
VL - 55
SP - 9047
EP - 9057
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 14
ER -