Coherence and pair-breaking effect in the heavy-fermion superconductor CeCu2Si2
Chen Chang-feng, Wu Qilin, Zhang Li-yuan
DOI 10.1103/PhysRevB.33.7503 · Physical Review B
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Abstract
Anomalous behavior of the specific heat and the nuclear relaxation rate in the heavy-fermion superconductor CeCu2Si2 are discussed in the framework of an extended Bardeen-Cooper-Schrieffer theory. Coherence and pair-breaking effect, which results from repulsive Coulomb interactions between f electrons with opposite spins, in this Kondo-lattice system have been taken into account. Numerical results are fairly consistent with experimental results. The conclusion is that CeCu2Si2 is an s-wave superconductor.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeCu2Si2 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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