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.

quantum of conductance

Andreev reflection

InAs nanowires

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

Peking University

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 3614-3617

Areas of Advance

Nanoscience and Nanotechnology

Subject Categories

Nano Technology

Chemical Sciences

DOI

10.1021/nl4014265

More information

Latest update

3/2/2018 9