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Supercurrent and Multiple Andreev Reflections in an InSb Nanowire Josephson Junction

Nilsson, Henrik LU ; Samuelsson, Peter LU ; Caroff, Philippe LU and Xu, Hongqi LU (2012) In Nano Letters 12(1). p.228-233
Abstract
Epitaxially grown, high quality semiconductor InSb nanowires are emerging material systems for the development of high performance nanoelectronics and quantum information processing and communication devices and for the studies of new physical phenomena in solid state systems. Here, we report on measurements of a superconductor-normal conductor-superconductor junction device fabricated from an InSb nanowire with aluminum-based superconducting contacts. The measurements show a proximity-induced supercurrent flowing through the InSb nanowire segment with a critical current tunable by a gate in the current bias configuration and multiple Andreev reflection characteristics in the voltage bias configuration. The temperature dependence and the... (More)
Epitaxially grown, high quality semiconductor InSb nanowires are emerging material systems for the development of high performance nanoelectronics and quantum information processing and communication devices and for the studies of new physical phenomena in solid state systems. Here, we report on measurements of a superconductor-normal conductor-superconductor junction device fabricated from an InSb nanowire with aluminum-based superconducting contacts. The measurements show a proximity-induced supercurrent flowing through the InSb nanowire segment with a critical current tunable by a gate in the current bias configuration and multiple Andreev reflection characteristics in the voltage bias configuration. The temperature dependence and the magnetic field dependence of the critical current and the multiple Andreev reflection characteristics of the junction are also studied. Furthermore, we extract the excess current from the measurements and study its temperature and magnetic field dependences. The successful observation of the superconductivity in the InSb nanowire-based Josephson junction device indicates that InSb nanowires provide an excellent material system for creating and observing novel physical phenomena such as Majorana fermions in solid-state systems. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
12
issue
1
pages
228 - 233
publisher
The American Chemical Society
external identifiers
  • wos:000298943100040
  • pmid:22142358
  • scopus:84855766400
ISSN
1530-6992
DOI
10.1021/nl203380w
language
English
LU publication?
yes
id
e309f08c-4cac-438a-8173-aa9bbfb98ad6 (old id 2274547)
date added to LUP
2012-01-09 22:14:56
date last changed
2017-04-30 11:37:36
@article{e309f08c-4cac-438a-8173-aa9bbfb98ad6,
  abstract     = {Epitaxially grown, high quality semiconductor InSb nanowires are emerging material systems for the development of high performance nanoelectronics and quantum information processing and communication devices and for the studies of new physical phenomena in solid state systems. Here, we report on measurements of a superconductor-normal conductor-superconductor junction device fabricated from an InSb nanowire with aluminum-based superconducting contacts. The measurements show a proximity-induced supercurrent flowing through the InSb nanowire segment with a critical current tunable by a gate in the current bias configuration and multiple Andreev reflection characteristics in the voltage bias configuration. The temperature dependence and the magnetic field dependence of the critical current and the multiple Andreev reflection characteristics of the junction are also studied. Furthermore, we extract the excess current from the measurements and study its temperature and magnetic field dependences. The successful observation of the superconductivity in the InSb nanowire-based Josephson junction device indicates that InSb nanowires provide an excellent material system for creating and observing novel physical phenomena such as Majorana fermions in solid-state systems.},
  author       = {Nilsson, Henrik and Samuelsson, Peter and Caroff, Philippe and Xu, Hongqi},
  issn         = {1530-6992},
  language     = {eng},
  number       = {1},
  pages        = {228--233},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Supercurrent and Multiple Andreev Reflections in an InSb Nanowire Josephson Junction},
  url          = {http://dx.doi.org/10.1021/nl203380w},
  volume       = {12},
  year         = {2012},
}