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

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.84.045103· OSTI ID:21596832

Foyevtsov, Oleksandr; Porrati, Fabrizio; Huth, Michael ^[1]

---

1. Physikalisches Institut, Goethe University, Frankfurt am Main, 60438 (Germany)

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.

• OSTI ID: 21596832
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 84, Issue 4; Other Information: DOI: 10.1103/PhysRevB.84.045103; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

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