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Quantized Conductance and Its Correlation to the Supercurrent in a Nanowire Connected to Superconductors

Abay, Simon ; Persson, Daniel ; Nilsson, Henrik LU ; Xu, Hongqi LU ; Fogelstrom, Mikael ; Shumeiko, Vitaly and Delsing, Per (2013) In Nano Letters 13(8). p.3614-3617
Abstract
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.
Please use this url to cite or link to this publication:
author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
InAs nanowires, supercurrent, Andreev reflection, quantum of conductance
in
Nano Letters
volume
13
issue
8
pages
3614 - 3617
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000323241000026
  • scopus:84881582312
  • pmid:23898893
ISSN
1530-6992
DOI
10.1021/nl4014265
language
English
LU publication?
yes
id
e6f7232c-ed02-4e9a-86fa-ae905edbee6c (old id 4025904)
date added to LUP
2016-04-01 14:08:27
date last changed
2023-10-15 13:18:28
@article{e6f7232c-ed02-4e9a-86fa-ae905edbee6c,
  abstract     = {{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.}},
  author       = {{Abay, Simon and Persson, Daniel and Nilsson, Henrik and Xu, Hongqi and Fogelstrom, Mikael and Shumeiko, Vitaly and Delsing, Per}},
  issn         = {{1530-6992}},
  keywords     = {{InAs nanowires; supercurrent; Andreev reflection; quantum of conductance}},
  language     = {{eng}},
  number       = {{8}},
  pages        = {{3614--3617}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Nano Letters}},
  title        = {{Quantized Conductance and Its Correlation to the Supercurrent in a Nanowire Connected to Superconductors}},
  url          = {{http://dx.doi.org/10.1021/nl4014265}},
  doi          = {{10.1021/nl4014265}},
  volume       = {{13}},
  year         = {{2013}},
}