1993/07/28 by Keisuke Harigaya, Kikuo Harigaya, G. A. Gehring +1
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat
paper · pdf · doi:10.1088/0953-8984/6/5/007
published as J. Phys.: Condens. Matter 6 (1994) 977-984 · LaTeX file, 7 pages, 1 figure, Please request the figure to one of Authors. It will be sent by the snail mail
arxiv created 1993/07/28 · openalex publication_date 1994/01/31 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
For part I see ibid., vol.5, p.5277 (1993). The elastic anomaly observed in the coherent Kondo state of Ce heavy-fermion compounds is analysed using the Anderson lattice model simulating the energy level scheme of the CeTe cubic crystal. The Gamma 7 doublets and Gamma 8 quartets of the 4f states are considered in the model. We solve the mean field equations to derive the temperature dependencies of elastic constants, using the random phase approximation for the interaction between the elastic strain and the crystalline field splitting. We compare the calculation with the (c 11 c 12 )/2 and c 44 constants of CeTe. The presence of the downward dip and the observed overall temperature variations of the two constants are well described by the present theory. The origin of the dip is the coupling between the elastic strain and the splitting of the Gamma 8 quartets.