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Filling dependence of a new type of charge ordered liquid on a triangular lattice system

Chisa Hotta, Nobuo Furukawa

cond-mat.str-elarXiv:cond-mat/0607181

Abstract

We study the recently reported characteristic gapless charge ordered state in a spinless fermion system on a triangular lattice under strong inter-site Coulomb interactions. In this state the charges are spontaneously divided into solid and liquid component, and the former solid part aligns in a Wigner crystal manner while the latter moves among them like a pinball. We show that such charge ordered liquid is stable over a wide range of filling, 1/3<n<2/3, and examine its filling dependent nature.

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