TY  - JOUR
AU  - Günel, H. Y.
AU  - Borgwardt, N.
AU  - Batov, I. E.
AU  - Hardtdegen, Hilde
AU  - Sladek, Kamil
AU  - Panaitov, Gregory
AU  - Grützmacher, Detlev
AU  - Schäpers, Thomas
TI  - Crossover from Josephson Effect to Single Interface Andreev Reflection in Asymmetric Superconductor/Nanowire Junctions
JO  - Nano letters
VL  - 14
SN  - 1530-6992
CY  - Washington, DC
PB  - ACS Publ.
M1  - FZJ-2014-04975
SP  - 4977-4981
PY  - 2014
AB  - We report on the fabrication and characterization of symmetric nanowire-based Josephson junctions, that is, Al- and Nb-based junctions, and asymmetric junctions employing superconducting Al and Nb. In the symmetric junctions, a clear and pronounced Josephson supercurrent is observed. These samples also show clear signatures of subharmonic gap structures. At zero magnetic field, a Josephson coupling is found for theasymmetric Al/InAs-nanowire/Nb junctions as well. By applying a magnetic field above the criticalfield of Al or by raising the temperature above the critical temperature of Al the junction can be switched to an effective singleinterface superconductor/nanowire structure. In this regime, a pronounced zero-bias conductance peak due to reflectionless tunneling has been observed.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000341544500009
C6  - pmid:25118624
DO  - DOI:10.1021/nl501350v
UR  - https://juser.fz-juelich.de/record/156101
ER  -