Jaime Merino, Arnaud Ralko, Simone Fratini
We study charge ordering driven by Coulomb interactions on triangular lattices relevant to the Wigner-Mott transition in two dimensions. Dynamical mean-field theory reveals a pinball liquid phase whose low energy properties are captured by the periodic Anderson model. Strong quasiparticle renormalization is predicted at the onset of Kondo antiferromagnetic coupling between localized electrons (pins) and itinerant carriers (balls). Non-Fermi liquid behavior can occur in such charge ordered systems due to spin-flip scattering of itinerant electrons off the pins in analogy with heavy fermion compounds.
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http://arxiv.org/abs/1304.1700
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