Kondo Insulator description of spin state transition in FeSb2

Details Kondo Insulator description of spin state transition in FeSb2 Kondo Insulator description of spin state transition in FeSb2

2005-04-18

arxiv.org/abs/cond-mat/0504458v1

Physics

Condensed Matter

Strongly Correlated Electrons

Physical Review B in press (2005)

Scientific paper

10.1103/PhysRevB.72.045103

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.

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