Coupled superconducting and magnetic order in CeCoIn5

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Science

OSTI ID:960586

Movshovich, Roman ^[1]; Bauer, Eric D ^[1]; Sarrao, J D ^[1]; Thompson, Joe D ^[1]; Kenselmann, M ^[2]; Strassle, Th ^[3]; Niedermayer, C ^[3]; Sigrist, M ^[3]; Padmanabhan, B ^[3]; Zolliker, M ^[2]; Bianchi, A D ^[4]

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1. Los Alamos National Laboratory
2. PAUL SCHERRER INST.
3. ETH ZURICH
4. U. DE MONTREAL

Strong magnetic fluctuations can provide a coupling mechanism for electrons that leads to unconventional superconductivity. Magnetic order and superconductivity have been found to coexist in a number of magnetically-mediated superconductors, but these order parameters generally compete. We report that close to the upper critical field, CeCoIn{sub 5} adopts a multi-component ground state that simultaneously carries cooperating magnetic and superconducting order. Suppressing superconductivity in a first-order transition at the upper critical field leads to the simultaneous collapse of the magnetic order, showing that superconductivity is necessary for the magnetic order. A symmetry analysis of the coupling between the magnetic order and the superconducting gap function suggests a form of superconductivity that is associated with a non-vanishing momentum.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: DOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 960586
• Report Number(s): LA-UR-08-05388; LA-UR-08-5388
• Journal Information: Science, Journal Name: Science; ISSN 0193-4511; ISSN SCEHDK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COUPLING
CRITICAL FIELD
ELECTRONS
FLUCTUATIONS
FUNCTIONS
GROUND STATES
ORDER PARAMETERS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SYMMETRY