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  • Title: Layered Kondo lattice model for quantum critical beta-YbAlB4.
    Author: Nevidomskyy AH, Coleman P.
    Journal: Phys Rev Lett; 2009 Feb 20; 102(7):077202. PubMed ID: 19257709.
    Abstract:
    We analyze the magnetic and electronic properties of the quantum critical heavy fermion superconductor beta-YbAlB4, calculating the Fermi surface and the angular dependence of the extremal orbits relevant to the de Haas-van Alphen measurements. Using a combination of the realistic materials modeling and single-ion crystal field analysis, we are led to propose a layered Kondo lattice model for this system, in which two-dimensional boron layers are Kondo coupled via interlayer Yb moments in a Jz=+/-5/2 state. This model fits the measured single-ion magnetic susceptibility and predicts a substantial change in the electronic anisotropy as the system is pressure tuned through the quantum critical point.
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