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Universal low temperature properties of heavy Fermion systems

Journal Article · · Appl. Phys. Commun.; (United States)
OSTI ID:6263244
;
The authors present a microscopic derivation of the Fermi liquid properties of the Anderson lattice. Their calculations suggest that the low temperature heavy fermion state has a number of universal features, for which there is good experimental evidence. Using the Kondo boson 1/N expansion, they find the Fermi liquid is characterized by the mean field bare particles (which are heavy) and their respective interactions. The latter are mediated by fluctuations in the valence-conduction electron hybridization parameters. Their calculations lead to the following experimental predictions: (i) the low temperature specific heat behaves as C/sub nu/ = 'T) T/anti T/sub k/ with corrections ..delta..C/sub nu/ = (anti T/T/sub k/)/sup 3/ 1n (T/anti T/sub k/) (ii) the zero temperature spin susceptibility chi infinity 1/anti T/sub k/ and (iii) the resistivity rho infinity (T/anti T/sub k/)/sup 2/. These results all contain a unique low energy scale anti T/sub k/ which is proportional to the inverse effective mass. Experimental support for these predictions is provided by evidence of systematic scaling of chi and rho with ..gamma.. throughout the entire class of heavy fermion compounds. In addition they analyze recent pressure dependent specific heat measurement on UPt/sub 3/ combined with chi and rho data to conform the scaling of these quantities with a single strongly pressure dependent energy scale. This analysis provides evidence against current ferromagnetic spin fluctuation theories.
Research Organization:
Univ. of Chicago, IL
OSTI ID:
6263244
Journal Information:
Appl. Phys. Commun.; (United States), Journal Name: Appl. Phys. Commun.; (United States) Vol. 7:1-2; ISSN APCOD
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
656002* -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTINIDE ALLOYS
ALLOYS
DATA
FERMI GAS
FLUIDS
GASES
INFORMATION
INTERMETALLIC COMPOUNDS
KONDO EFFECT
MATHEMATICAL MODELS
NUMERICAL DATA
PHYSICAL PROPERTIES
PLATINUM ALLOYS
PLATINUM BASE ALLOYS
PLATINUM METAL ALLOYS
SPECIFIC HEAT
THEORETICAL DATA
THERMODYNAMIC PROPERTIES
URANIUM ALLOYS