Characteristics of CeCoIn5/Al/AlOx/Nb and CeCoIn5/Al/AlOx/Al tunnel junctions

I. P. Nevirkovets; O. Chernyashevskyy; C. Petrovic; Rongwei Hu; J. B. Ketterson; Bimal K. Sarma

doi:10.1016/j.physc.2009.02.013

Characteristics of CeCoIn₅/Al/AlO_x/Nb and CeCoIn₅/Al/AlO_x/Al tunnel junctions

I. P. Nevirkovets^*, O. Chernyashevskyy, C. Petrovic, Rongwei Hu, J. B. Ketterson, Bimal K. Sarma

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We report characteristics of CeCoIn₅/Al/AlO_x/Nb and CeCoIn₅/Al/AlO_x/Al tunnel junctions fabricated on the (0 0 1) surface of CeCoIn₅ crystal platelets. The main result of this work is the observation of a low Josephson current (as compared with that expected from the Ambegaokar-Baratoff formula), which is consistent with idea that the order parameter in the heavy-fermion superconductor CeCoIn₅ has unconventional pairing symmetry.

Original language	English (US)
Pages (from-to)	293-296
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	469
Issue number	7-8
DOIs	https://doi.org/10.1016/j.physc.2009.02.013
State	Published - Apr 1 2009

Funding

The authors are thankful to E. Goldobin for using his data acquisition software. This work was supported by the National Science Foundation under the Grants DMR-0509357 and DMR-0509691. Part of this work was carried out at the Brookhaven National Laboratory which is operated for the US Department of Energy by Brookhaven Science Associates (DE-Ac02-98CH10886).

Keywords

Heavy-fermions
Josephson effect
Proximity effect
Superconductivity
Tunnel junctions
Tunneling

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2009.02.013

Cite this

@article{49f68b078c2846839d0fef6f49dc950c,

title = "Characteristics of CeCoIn5/Al/AlOx/Nb and CeCoIn5/Al/AlOx/Al tunnel junctions",

abstract = "We report characteristics of CeCoIn5/Al/AlOx/Nb and CeCoIn5/Al/AlOx/Al tunnel junctions fabricated on the (0 0 1) surface of CeCoIn5 crystal platelets. The main result of this work is the observation of a low Josephson current (as compared with that expected from the Ambegaokar-Baratoff formula), which is consistent with idea that the order parameter in the heavy-fermion superconductor CeCoIn5 has unconventional pairing symmetry.",

keywords = "Heavy-fermions, Josephson effect, Proximity effect, Superconductivity, Tunnel junctions, Tunneling",

author = "Nevirkovets, {I. P.} and O. Chernyashevskyy and C. Petrovic and Rongwei Hu and Ketterson, {J. B.} and Sarma, {Bimal K.}",

note = "Funding Information: The authors are thankful to E. Goldobin for using his data acquisition software. This work was supported by the National Science Foundation under the Grants DMR-0509357 and DMR-0509691. Part of this work was carried out at the Brookhaven National Laboratory which is operated for the US Department of Energy by Brookhaven Science Associates (DE-Ac02-98CH10886). Copyright: Copyright 2009 Elsevier B.V., All rights reserved.",

year = "2009",

month = apr,

day = "1",

doi = "10.1016/j.physc.2009.02.013",

language = "English (US)",

volume = "469",

pages = "293--296",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

number = "7-8",

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TY - JOUR

T1 - Characteristics of CeCoIn5/Al/AlOx/Nb and CeCoIn5/Al/AlOx/Al tunnel junctions

AU - Nevirkovets, I. P.

AU - Chernyashevskyy, O.

AU - Petrovic, C.

AU - Hu, Rongwei

AU - Ketterson, J. B.

AU - Sarma, Bimal K.

N1 - Funding Information: The authors are thankful to E. Goldobin for using his data acquisition software. This work was supported by the National Science Foundation under the Grants DMR-0509357 and DMR-0509691. Part of this work was carried out at the Brookhaven National Laboratory which is operated for the US Department of Energy by Brookhaven Science Associates (DE-Ac02-98CH10886). Copyright: Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2009/4/1

Y1 - 2009/4/1

N2 - We report characteristics of CeCoIn5/Al/AlOx/Nb and CeCoIn5/Al/AlOx/Al tunnel junctions fabricated on the (0 0 1) surface of CeCoIn5 crystal platelets. The main result of this work is the observation of a low Josephson current (as compared with that expected from the Ambegaokar-Baratoff formula), which is consistent with idea that the order parameter in the heavy-fermion superconductor CeCoIn5 has unconventional pairing symmetry.

AB - We report characteristics of CeCoIn5/Al/AlOx/Nb and CeCoIn5/Al/AlOx/Al tunnel junctions fabricated on the (0 0 1) surface of CeCoIn5 crystal platelets. The main result of this work is the observation of a low Josephson current (as compared with that expected from the Ambegaokar-Baratoff formula), which is consistent with idea that the order parameter in the heavy-fermion superconductor CeCoIn5 has unconventional pairing symmetry.

KW - Heavy-fermions

KW - Josephson effect

KW - Proximity effect

KW - Superconductivity

KW - Tunnel junctions

KW - Tunneling

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DO - 10.1016/j.physc.2009.02.013

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EP - 296

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

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