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On the specific heat of dilute magnetic alloys
Author(s) -
Sólyom J.,
Zawadowski A.
Publication year - 1968
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19680250145
Subject(s) - renormalization , condensed matter physics , specific heat , magnetic field , physics , polarization (electrochemistry) , materials science , effective mass (spring–mass system) , thermodynamics , chemistry , quantum mechanics
It is shown that for the Kondo model of dilute magnetic alloys a mass renormalization due to an energy dependent self‐energy causes no enhancement of the specific heat. It is proved that in the homogeneously polarized state the mass renormalization is caused by ∑ (ω) ≈ ‐ α ω and therefore the observed excess specific heat in dilute magnetic alloys comes from the inhomogeneity of the polarization. In external magnetic fields a contribution to the specific heat appears, which, in high field, is inversely proportional to H .