| Issue |
EPL
Volume 77, Number 3, February 2007
|
|
|---|---|---|
| Article Number | 36001 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/77/36001 | |
| Published online | 22 January 2007 | |
On the specific heat of heavy-fermion systems using the periodic Anderson model
Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, Bangalore 560064, India
Corresponding author: raja@jncasr.ac.in
Received:
17
August
2006
Accepted:
27
November
2006
The periodic Anderson model (PAM) represents a paradigm for understanding the physics of heavy-fermion (HF) compounds. In this paper, we study the specific heat of HF systems using the PAM within the framework of dynamical mean-field theory. By examining the systematic variation of specific heat as a function of particle-hole asymmetry and coupling strength, with the natural focus being on strong coupling, it is demonstrated that experimentally measured specific heat of a variety of paramagnetic Kondo insulators such as 
, 
, FeSi, CeRhSb and HF metals such as 
, 
and 
can be understood semi-quantitatively using the PAM.
PACS: 65.40.Ba – Heat capacity / 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.20.Hr – Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions
© Europhysics Letters Association, 2007
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