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Phys Rev Lett. 2006 Nov 3;97(18):185701. Epub 2006 Oct 31.

Quantum critical end point for the Kondo volume collapse model.

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1
Department of Physics and Astronomy, Iowa State University and Ames Laboratory, Ames, Iowa 50011, USA.

Erratum in

  • Phys Rev Lett. 2010 Mar 19;104(11):119901.

Abstract

The Kondo volume collapse describes valence transitions in f-electron metals and is characterized by a line of first order transitions in the pressure-temperature phase plane terminated at critical end points. We analyze the quantum critical end point, when the lower end point is tuned to T=0, and determine the specific heat, thermal expansion, and compressibility. We find that the inclusion of quantum critical fluctuations leads to a novel bifurcation of the first order phase line. Finally, we show that critical strain fluctuations can cause both, superconductivity and non-Fermi liquid behavior near the critical point.

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