Model of quantum criticality in He3 bilayers adsorbed on graphite.
Recent experiments on He3 bilayers adsorbed on graphite have shown striking quantum critical properties at the point where the first layer localizes. We model this system with the Anderson lattice plus interlayer Coulomb repulsion in two dimensions. Assuming that quantum critical fluctuations come from a vanishing of the effective hybridization, we can reproduce several features of the system, including the apparent occurrence of two quantum critical points, the variation of the effective mass and coherence temperature with coverage.
SPhT, CEA-Saclay, L'Orme des Merisiers, 91191 Gif-sur-Yvette, France.
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Benlagra
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Pépin