1996/07/09 by J. K. Freericks, Freericks, J. K., V. Zlatic +1
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9607068
5 pages, ReVTeX, 6 encapsulated postscript figures included
arxiv created 1996/07/09 · arxiv updated 2009/11/30
The exact solution of the spin one-half Falicov-Kimball model, with random hopping between the lattice sites, is used to explain the anomalous magnetic response of Yb-based valence-fluctuating intermetallic compounds. The anomalous behavior arises from an entropy-driven local-moment--nonmagnetic transition of unhybridized Yb ions in these materials which can also be used to explain the observed metamagnetism and resistivity anomalies.