Quantum critical end point of the Kondo volume collapse

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.

arXiv comment4 pages, 2 figures; updated version with revised figures and text

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• Reentrant valence transition in EuO at high pressures: beyond the bond-valence model
• Pressure-induced magnetic transition and volume collapse in FeAs superconductors: An orbital-selective Mott scenario
• Unconventional Quantum Criticality due to Critical Valence Transition
• Meta-orbital Transition in Heavy-fermion Systems: Analysis by Dynamical Mean Field Theory and Self-consistent Renormalization Theory of Orbital Fluctuations
• Nanoscale Proximity Effect in the High Temperature Superconductor Bi-2212
• Kondo volume collapse, Kondo breakdown, and Fermi surface transitions in heavy-fermion metals
• Kondo-induced giant isotropic negative thermal expansion
• Tricritical Phenomena at the Cerium $\gamma \to \alpha$ Transition
• Quantum criticality in itinerant metamagnets
• Quantum discontinuity fixed point and renormalization group flow of the SYK model