Quantum critical end point of the Kondo volume collapse

Details Quantum critical end point of the Kondo volume collapse Quantum critical end point of the Kondo volume collapse

2006-03-09

arxiv.org/abs/cond-mat/0603259v2

Phys. Rev. Lett. 97, 185701 (2006); see also Erratum: Phys. Rev. Lett. 104, 119901 (2010).

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures; updated version with revised figures and text

Scientific paper

10.1103/PhysRevLett.97.185701

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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