Sampathkumaran, E. V. ; Vijayaraghavan, R. (1986) Evidence for 4f-ligand dehybridization in the evolution of heavy-fermion behavior in the series CeCu2−xNixSi2 Physical Review Letters, 56 (26). pp. 2861-2864. ISSN 0031-9007
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Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.56.286...
Related URL: http://dx.doi.org/10.1103/PhysRevLett.56.2861
Abstract
Evolution of heavy-fermion behavior in CeCu2Si2 from strong mixed valence in CeNi2Si2 is demonstrated in the CeCu2−xNixSi2 system. Heavy-fermion behavior, as probed by the low-temperature susceptibility, χ(O), is destroyed at xapeq20.65. There is an anomalous increase in the Ce-ligand distances, without any anomaly in the Ce-Ce separation, for x < 0.65, tracking the x dependence of χ(O). This observation shows explicitly for the first time that the tendency for dehybridization of the ligand valence orbitals with the Ce 4f orbital is essential to attain the heavy-fermion ground state.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 45632 |
| Deposited On: | 29 Jun 2011 03:14 |
| Last Modified: | 29 Jun 2011 03:14 |
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