Quantized Conductance and Its Correlation to the Supercurrent in a Nanowire Connected to Superconductors
Journal article, 2013
We report conductance and supercurrent of InAs nano wires coupled to Al-superconducting electrodes with short channel lengths and good Ohmic contacts. The nanowires are suspended 15 nm above a local gate electrode. The charge density in the nanowires can be controlled by a small change in the gate voltage. For large negative gate voltages, the number of conducting channels is reduced gradually, and we observe a stepwise decrease of both conductance and critical current before the conductance vanishes completely.
InAs nanowires
Andreev reflection
quantum of conductance
supercurrent
Author
Simon Abay
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Daniel Persson
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
H. Nilsson
Lund University
H. Q. Xu
Beijing University of Technology
Lund University
Mikael Fogelström
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
Vitaly Shumeiko
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
Per Delsing
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 13 8 3614-3617Areas of Advance
Nanoscience and Nanotechnology
Subject Categories
Nano Technology
Chemical Sciences
DOI
10.1021/nl4014265