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Author Romero, M.A.; Aligia, A.A.; Sereni, J.G.; Nieva, G.
Title Interpretation of experimental results on Kondo systems with crystal field Type Journal Article
Year 2014 Publication Journal of Physics: Condensed Matter Abbreviated Journal J. Phys. : Condens. Matter
Volume 26 Issue Pages 025602
Keywords cond-mat.str-el
Abstract We present a simple approach to calculate the thermodynamic properties of single Kondo impurities including orbital degeneracy and crystal field effects (CFE) by extending a previous proposal by K. D. Schotte and U. Schotte [Physics Lett. A 55, 38 (1975)]. Comparison with exact solutions for the specific heat of a quartet ground state split into two doublets shows deviations below $10\%$ in absence of CFE and a quantitative agreement for moderate or large CFE. As an application, we fit the measured specific heat of the compounds CeCu$2$Ge$2$, CePd${3}$Si${0.3}$, CePdAl, CePt, Yb$2$Pd$2$Sn and YbCo$2$Zn${20}$. The agreement between theory and experiment is very good or excellent depending on the compound, except at very low temperatures due to the presence of magnetic correlations (not accounted in the model).
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Notes arXiv:1308.3256v3; Journal Ref: J. Phys.: Condens. Matter 26 (2014) 025602 (9pp) Approved no
Call Number BT @ berisso @ Serial 675
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Author Sereni, J.G.
Title First observation of Ce volume collapse in CeN Type Manuscript
Year 2017 Publication arXiv Abbreviated Journal arXiv
Volume Issue Pages 1712.10036
Keywords cond-mat.str-el
Abstract On the occasion of the 80th anniversary of the first observation of Ce volume collapse in CeN a remembrance of the implications of that transcendent event is presented, along with a review of the knowledge of Ce physical properties available at that time. Coincident anniversary corresponds to the first proposal for Ce as a mix valence element, motivating to briefly review how the valence instability of Ce was investigated since that time.
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Notes arXiv:1712.10036v1; This review was presented in a plenary session at the SCES 2017 conference, Prague, 17 July 2017 Approved no
Call Number BT @ pedrazp @ Serial 781
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