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Thermal-transport properties of CeNiSn
- Source :
- Scopus-Elsevier
- Publication Year :
- 2001
- Publisher :
- Elsevier BV, 2001.
-
Abstract
- We present thermal-conductivity $\ensuremath{\kappa}$ and thermopower S measurements on high-quality single crystalline CeNiSn along the three crystallographic axes $a, b,$ and c in the temperature range between 100 mK and 7 K and in magnetic fields up to 8 T applied along the a axis. Both $\ensuremath{\kappa}$ and S are highly anisotropic. However, characteristic features that may be attributed to the opening of a pseudogap in the electronic density of states (DOS) at the Fermi energy $\ensuremath{\eta}$ below 10 K are seen for all three crystallographic directions. These features are strongly suppressed by a magnetic field of 8 T applied along the a axis. At the lowest temperatures we have evidence for the presence of a residual metallic DOS at $\ensuremath{\eta},$ again for all three directions. The saturation of the reduced Lorenz number ${L/L}_{0}$ to a value distinctly higher than one is an interesting feature which deserves further investigation.
- Subjects :
- Physics
Materials science
Condensed matter physics
Kondo insulator
Fermi energy
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Magnetic field
Seebeck coefficient
Saturation (graph theory)
Density of states
Condensed Matter::Strongly Correlated Electrons
Strongly correlated material
Kondo effect
Atomic physics
Pseudogap
Anisotropy
Subjects
Details
- ISSN :
- 03048853
- Database :
- OpenAIRE
- Journal :
- Journal of Magnetism and Magnetic Materials
- Accession number :
- edsair.doi.dedup.....f547d87afb8ae19e82d34ab8b9f363ee