Unusual behavior of nuclear relaxation in CeCu2Si2 'possible evidence for triplet superconductivity'
Creators
- 1. Kobe Univ. (Japan). Faculty of Science
- 2. Kobe Univ. (Japan). Graduate School of Science and Technology
- 3. Kobe Univ. (Japan). Coll. of Liberal Arts
Description
Nuclear relaxation of 63Cu in the superconducting state of the Kondo-lattice system CeCu2Si2 has been studied with the use of the 63Cu nuclear quadrupole resonance technique under zero field and down to 65mK. The nuclear spin-lattice relaxation rate (1/T1) decreases drastically just below Tsub(c)=0.67 K down to 0.5Tsub(c) without the apparent enhanced behavior and then is found to be almost temperature independent below 0.3Tsub(c). These results suggest that the superconductivity in CeCu2Si2 is not in the usual BCS regime. The analysis based upon the existing triplet pairing model with an anisotropic energy gap describes well the behavior from Tsub(c) down to 0.5Tsub(c), while the temperature independence below 0.3Tsub(c) remains unexplained. (author)
Additional details
Publishing Information
- Journal Title
- Solid State Commun.
- Journal Volume
- 51
- Journal Issue
- 7
- Series
- Solid State Commun.
- Journal Page Range
- 461-466
- ISSN
- 0038-1098
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 16003868
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS;
- Descriptors DEI
- CERIUM SILICIDES; COPPER SILICIDES; ENERGY GAP; NUCLEAR QUADRUPOLE RESONANCE; RELAXATION TIME; SPIN-LATTICE RELAXATION; SUPERCONDUCTIVITY; TEMPERATURE DEPENDENCE; TRIPLETS; ULTRALOW TEMPERATURE
- Descriptors DEC
- CERIUM COMPOUNDS; COPPER COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; MULTIPLETS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; RELAXATION; RESONANCE; SILICIDES; SILICON COMPOUNDS; TRANSITION ELEMENT COMPOUNDS