Study of the josephson current of mgb2lnsulator/pb tunnel junctions

Ke Chen; Qi Li; Xiaoxing Xi

doi:10.1109/TASC.2009.2019540

Study of the josephson current of mgb₂lnsulator/pb tunnel junctions

Ke Chen, Qi Li, Xiaoxing Xi

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

3 Scopus citations

Abstract

We have fabricated MgB₂/Insulator/Pb Josephson tunnel junctions on MgB₂ films deposited by hybrid physical-chemical vapor deposition using native oxide as the tunnel barrier. For the critical current of the junction on MgB₂ (0001) film, its temperature dependence follows the Am- begaokar-Baratoff relation and its magnetic field dependence exhibits a Fraunhofer pattern. From analysing the magnetic field dependence of the critical current of the junction on c-axis tilted MgB₂ film, we find small contribution of the Josephson current from the ab-plane tunneling, which may suggest a π phase difference between the order parameters of MgB _2π and δ bands.

Original language	English (US)
Article number	5153090
Pages (from-to)	261-264
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	19
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2009.2019540
State	Published - Jun 2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/TASC.2009.2019540

Cite this

@article{206b66cca30b4b1e9f6b6923ec8de68c,

title = "Study of the josephson current of mgb2lnsulator/pb tunnel junctions",

abstract = "We have fabricated MgB2/Insulator/Pb Josephson tunnel junctions on MgB2 films deposited by hybrid physical-chemical vapor deposition using native oxide as the tunnel barrier. For the critical current of the junction on MgB2 (0001) film, its temperature dependence follows the Am- begaokar-Baratoff relation and its magnetic field dependence exhibits a Fraunhofer pattern. From analysing the magnetic field dependence of the critical current of the junction on c-axis tilted MgB2 film, we find small contribution of the Josephson current from the ab-plane tunneling, which may suggest a π phase difference between the order parameters of MgB 2π and δ bands.",

author = "Ke Chen and Qi Li and Xiaoxing Xi",

note = "Funding Information: Manuscript received August 26, 2008. First published June 30, 2009; current version published July 10, 2009. This work was partially funded by ONR under Grant N00014-07-1-0079 (X.X.X.) and by NSF under Grant DMR-0405502 (Q.L.).",

year = "2009",

month = jun,

doi = "10.1109/TASC.2009.2019540",

language = "English (US)",

volume = "19",

pages = "261--264",

journal = "IEEE Transactions on Applied Superconductivity",

issn = "1051-8223",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "3",

}

TY - JOUR

T1 - Study of the josephson current of mgb2lnsulator/pb tunnel junctions

AU - Chen, Ke

AU - Li, Qi

AU - Xi, Xiaoxing

N1 - Funding Information: Manuscript received August 26, 2008. First published June 30, 2009; current version published July 10, 2009. This work was partially funded by ONR under Grant N00014-07-1-0079 (X.X.X.) and by NSF under Grant DMR-0405502 (Q.L.).

PY - 2009/6

Y1 - 2009/6

N2 - We have fabricated MgB2/Insulator/Pb Josephson tunnel junctions on MgB2 films deposited by hybrid physical-chemical vapor deposition using native oxide as the tunnel barrier. For the critical current of the junction on MgB2 (0001) film, its temperature dependence follows the Am- begaokar-Baratoff relation and its magnetic field dependence exhibits a Fraunhofer pattern. From analysing the magnetic field dependence of the critical current of the junction on c-axis tilted MgB2 film, we find small contribution of the Josephson current from the ab-plane tunneling, which may suggest a π phase difference between the order parameters of MgB 2π and δ bands.

AB - We have fabricated MgB2/Insulator/Pb Josephson tunnel junctions on MgB2 films deposited by hybrid physical-chemical vapor deposition using native oxide as the tunnel barrier. For the critical current of the junction on MgB2 (0001) film, its temperature dependence follows the Am- begaokar-Baratoff relation and its magnetic field dependence exhibits a Fraunhofer pattern. From analysing the magnetic field dependence of the critical current of the junction on c-axis tilted MgB2 film, we find small contribution of the Josephson current from the ab-plane tunneling, which may suggest a π phase difference between the order parameters of MgB 2π and δ bands.

UR - http://www.scopus.com/inward/record.url?scp=68649123992&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=68649123992&partnerID=8YFLogxK

U2 - 10.1109/TASC.2009.2019540

DO - 10.1109/TASC.2009.2019540

M3 - Article

AN - SCOPUS:68649123992

SN - 1051-8223

VL - 19

SP - 261

EP - 264

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 3

M1 - 5153090

ER -

Study of the josephson current of mgb₂lnsulator/pb tunnel junctions

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this