Kondo Insulator description of spin state transition in FeSb2
arXiv:cond-mat/0504458 · doi:10.1103/PhysRevB.72.045103
Abstract
The thermal expansion and heat capacity of FeSb2 at ambient pressure agrees with a picture of a temperature induced spin state transition within the Fe t_{2g} multiplet. However, high pressure powder diffraction data show no sign of a structural phase transition up to 7GPa. A bulk modulus B=84(3)GPa has been extracted and the temperature dependence of the Gruneisen parameter has been determined. We discuss here the relevance of a Kondo insulator description for this material.
Physical Review B in press (2005)