Volume 77, Number 3, February 2007
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|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: email@example.com
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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