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Title: Josephson effect in CeCoIn{sub 5} microbridges as seen via quantum interferometry

Abstract

A superconducting quantum interference device (SQUID) was prepared on a micron-sized single crystal using a selected growth domain of a thin film of CeCoIn{sub 5} grown by molecular beam epitaxy. SQUID voltage oscillations of good quality were obtained as well as interference effects stemming from the individual Josephson microbridges. The transport characteristics in the superconducting state exhibited several peculiarities which we ascribe to the periodic motion of vortices in the microbridges. The temperature dependence of the Josephson critical current shows good correspondence to the Ambegaokar-Baratoff relation, expected for the ideal Josephson junction. The results indicate a promising pathway to identify the type of order parameter in CeCoIn{sub 5} by means of phase-sensitive measurements on microbridges.

Authors:
; ;  [1]
  1. Physikalisches Institut, Goethe University, Frankfurt am Main, 60438 (Germany)
Publication Date:
OSTI Identifier:
21596832
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevB.84.045103; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CERIUM COMPOUNDS; COBALT COMPOUNDS; CRITICAL CURRENT; ELECTRIC CONDUCTIVITY; INDIUM COMPOUNDS; INTERFERENCE; INTERFEROMETRY; JOSEPHSON EFFECT; JOSEPHSON JUNCTIONS; MOLECULAR BEAM EPITAXY; MONOCRYSTALS; ORDER PARAMETERS; OSCILLATIONS; PERIODICITY; SQUID DEVICES; TEMPERATURE DEPENDENCE; THIN FILMS; CRYSTAL GROWTH METHODS; CRYSTALS; CURRENTS; DIMENSIONLESS NUMBERS; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; ELECTRONIC EQUIPMENT; EPITAXY; EQUIPMENT; FILMS; FLUXMETERS; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SUPERCONDUCTING DEVICES; SUPERCONDUCTING JUNCTIONS; TRANSITION ELEMENT COMPOUNDS; VARIATIONS

Citation Formats

Foyevtsov, Oleksandr, Porrati, Fabrizio, and Huth, Michael. Josephson effect in CeCoIn{sub 5} microbridges as seen via quantum interferometry. United States: N. p., 2011. Web. doi:10.1103/PHYSREVB.84.045103.
Foyevtsov, Oleksandr, Porrati, Fabrizio, & Huth, Michael. Josephson effect in CeCoIn{sub 5} microbridges as seen via quantum interferometry. United States. doi:10.1103/PHYSREVB.84.045103.
Foyevtsov, Oleksandr, Porrati, Fabrizio, and Huth, Michael. Fri . "Josephson effect in CeCoIn{sub 5} microbridges as seen via quantum interferometry". United States. doi:10.1103/PHYSREVB.84.045103.
@article{osti_21596832,
title = {Josephson effect in CeCoIn{sub 5} microbridges as seen via quantum interferometry},
author = {Foyevtsov, Oleksandr and Porrati, Fabrizio and Huth, Michael},
abstractNote = {A superconducting quantum interference device (SQUID) was prepared on a micron-sized single crystal using a selected growth domain of a thin film of CeCoIn{sub 5} grown by molecular beam epitaxy. SQUID voltage oscillations of good quality were obtained as well as interference effects stemming from the individual Josephson microbridges. The transport characteristics in the superconducting state exhibited several peculiarities which we ascribe to the periodic motion of vortices in the microbridges. The temperature dependence of the Josephson critical current shows good correspondence to the Ambegaokar-Baratoff relation, expected for the ideal Josephson junction. The results indicate a promising pathway to identify the type of order parameter in CeCoIn{sub 5} by means of phase-sensitive measurements on microbridges.},
doi = {10.1103/PHYSREVB.84.045103},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 4,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}