Paramagnons in heavy-electron systems
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Department of Physics, Hokkaido University, Sapporo 060 (Japan)
Paramagnons in heavy-electron systems are theoretically examined. First, local spin fluctuations are fully included in the best single-site approximation. A local Kondo temperature is uniquely defined to show a characteristic energy scale of local spin fluctuations. Secondly, paramagnons are included perturbatively. Such a theory is applied to analyze the specific-heat data of heavy-electron compounds such as UAl{sub 2}, UPt{sub 3}, and CeSi{sub 1.85}, where anomalous {ital T}{sup 3}ln{ital T} terms are observed at low temperatures {ital T}{lt}10 K. It is argued that not only paramagnons but also local spin fluctuations are responsible for the low-temperature specific heat and that paramagnons are responsible for the anomalous {ital T}{sup 3}ln{ital T} terms.
- OSTI ID:
- 5238372
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:13; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CERIUM COMPOUNDS
CERIUM SILICIDES
FLUCTUATIONS
KONDO EFFECT
MAGNETISM
MAGNONS
PARAMAGNETISM
PHYSICAL PROPERTIES
PLATINUM ALLOYS
PLATINUM BASE ALLOYS
PLATINUM METAL ALLOYS
QUASI PARTICLES
RARE EARTH COMPOUNDS
SILICIDES
SILICON COMPOUNDS
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE
URANIUM ALLOYS
VARIATIONS
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CERIUM COMPOUNDS
CERIUM SILICIDES
FLUCTUATIONS
KONDO EFFECT
MAGNETISM
MAGNONS
PARAMAGNETISM
PHYSICAL PROPERTIES
PLATINUM ALLOYS
PLATINUM BASE ALLOYS
PLATINUM METAL ALLOYS
QUASI PARTICLES
RARE EARTH COMPOUNDS
SILICIDES
SILICON COMPOUNDS
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE
URANIUM ALLOYS
VARIATIONS