Kondo insulators

Z. Fisk, National High Magnetic Field Laboratory
J. L. Sarrao, National High Magnetic Field Laboratory
J. D. Thompson, Los Alamos National Laboratory
D. Mandrus, Los Alamos National Laboratory
M. F. Hundley, Los Alamos National Laboratory
A. Miglori, Los Alamos National Laboratory
B. Bucher, IBM Thomas J. Watson Research Center
Z. Schlesinger, IBM Thomas J. Watson Research Center
G. Aeppli, Nokia Bell Labs
E. Bucher, Nokia Bell Labs
J. F. DiTusa, Nokia Bell Labs
C. S. Oglesby, Nokia Bell Labs
H. R. Ott, ETH Zürich
P. C. Canfield, Ames Laboratory
S. E. Brown, University of California, Los Angeles

Abstract

The Kondo insulating materials present a particularly simple limiting case of the strongly correlated electron lattice problem, one occupied f-state interacting with a single half-filled conduction band. Experiment shows that the solution to this problem has some remarkably simple aspects. Optical conductivity data display the strong coupling nature of this physics. © 1995.