Unusual B-T phase diagram of the heavy-fermion superconductor CeCu2Si2
G. Bruls, B. Wolf, D. Finsterbusch, P. Thalmeier, I. Kouroudis, W. Sun, W. Assmus, B. Lüthi, M. Lang, K. Gloos, F. Steglich, R. Modler
DOI 10.1103/PhysRevLett.72.1754 · Physical Review Letters
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Abstract
Elastic constant and thermal expansion data for a high quality single crystal of CeCu2Si2 are presented. The data yield a detailed B-T phase diagram exhibiting a previously unknown high-field phase. From the unusual behavior of the elastic constants and the thermal expansion on entering the superconducting phase we deduce that, in contrast to other heavy-fermion superconductors, the superconducting phase of CeCu2Si2 does not coexist with the surrounding phase.
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. | 0.67 | Pressure unresolved | onset |
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