Anomaly in the heat capacity of Kondo superconductors
Rok Žitko, Thomas Pruschke
DOI 10.1103/PhysRevB.79.012507 · Physical Review B
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Abstract
Using numerical renormalization group, we study thermodynamic properties of a magnetic impurity described by the Anderson impurity model in a superconducting host material described by the BCS Hamiltonian. When the Kondo temperature in the normal state, TK, is comparable to the critical temperature of the superconducting transition, Tc, the magnetic doublet state may become degenerate with the Kondo singlet state, leading to a ln 3 peak in the temperature dependence of the impurity contribution to the entropy. This entropy increase translates into an anomalous feature in the heat capacity which might have already been experimentally observed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (La1-xCex)Al2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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