Spin-fluctuation mediated thermal conductivity around the magnetic instability of CeNi{sub 2}Ge{sub 2}
Journal Article
·
· Journal of Low Temperature Physics
Thermal conductivity has been measured from 0.03 K to 0.8 K in single crystal CeNi{sub 2}Ge{sub 2} which is quite near the quantum critical point (QCP). The Wiedemann-Franz law is observed at low temperatures (T < 0.1 K) for both directions (j {perpendicular} c and j {parallel} c), indicating that quasiparticles are scattered elastically as T {r{underscore}arrow} 0 K. With increasing temperature, a deviation from the Wiedemann-Franz law due to inelastic spin-fluctuation contributions is observed. The effect of proximity to the QCP in CeNi{sub 2}Ge{sub 2} appears in the spin-fluctuation contributions to the thermal and electrical conductivities.
- Research Organization:
- CEA/DSM, Grenoble (FR)
- OSTI ID:
- 20000646
- Journal Information:
- Journal of Low Temperature Physics, Vol. 117, Issue 1-2; Other Information: PBD: Oct 1999; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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