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Article Dans Une Revue Physical Review Letters Année : 2013

Emergent Heavy Fermion Behavior at the Wigner-Mott Transition

Arnaud Ralko
Simone Fratini

Résumé

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 the pinball liquid phase, a charge ordered metallic phase containing quasi-localized (pins) coexisting with itinerant (balls) electrons. Based on an effective periodic Anderson model for this phase, we find an antiferromagnetic Kondo coupling between pins and balls and strong quasiparticle renormalization. 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.

Dates et versions

hal-00865389 , version 1 (24-09-2013)

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Jaime Merino, Arnaud Ralko, Simone Fratini. Emergent Heavy Fermion Behavior at the Wigner-Mott Transition. Physical Review Letters, 2013, 111 (12), pp.126403. ⟨10.1103/PhysRevLett.111.126403⟩. ⟨hal-00865389⟩

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