Electronic Order with Staggered Kondo and Crystalline Electric Field Singlets

Details Electronic Order with Staggered Kondo and Crystalline Electric Field Singlets Electronic Order with Staggered Kondo and Crystalline Electric Field Singlets

2010-04-13

arxiv.org/abs/1004.2110v1

Journal of Physical Society of Japan, 79 (2010) 074720

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 17 figures

Scientific paper

10.1143/JPSJ.79.074720

Novel electronic order is found theoretically for a system where even number of localized electrons per site are coupled with conduction electrons. For precise quantitative study, a variant of the Kondo lattice model is taken with crystalline electric field (CEF) singlet and triplet states for each site. Using the dynamical mean-field theory combined with the continuous-time quantum Monte Carlo method, a staggered order with alternating Kondo and CEF singlets is identified for a case with one conduction electron per site being distributed in two conduction bands each of which is quarter-filled. This electronic order accompanies a charge density wave (CDW) of conduction electrons that accumulate more on Kondo-singlet sites than on CEF-singlet sites. Possible relevance of the present order to the scalar order in PrFe$_4$P$_{12}$ is discussed.

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