Two energy scales and slow crossover in YbAl3

Details Two energy scales and slow crossover in YbAl3 Two energy scales and slow crossover in YbAl3

2001-07-31

arxiv.org/abs/cond-mat/0107638v1

Physical Review Letters 88 (2002) 117201

Physics

Condensed Matter

Strongly Correlated Electrons

Ten pages, including three figures

Scientific paper

10.1016/S0921-4526(01)01112-7

Experimental results for the susceptibility, specific heat, 4f occupation number, Hall effect and magnetoresistance for single crystals of YbAl$_{3}$ show that, in addition to the Kondo energy scale $k_{B}T_{K}$ $% \sim $ 670K, there is a low temperature scale $T_{coh}<50$K for the onset of coherence. Furthermore the crossover from the low temperature Fermi liquid regime to the high temperature local moment regime is slower than predicted by the Anderson impurity model. These effects may reflect the behavior of the Anderson Lattice in the limit of low conduction electron density.

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