A quantum theory of the nearly frozen charge glass

Abstract

We study long-range interacting electrons on the triangular lattice using mixed quantum/classical simulations going beyond the usual classical descriptions of the lattice Coulomb fluid. Our results in the strong interaction limit indicate that the emergence and proliferation of quantum defects governs the low-temperature dynamics of this strongly frustrated system, in a way that crucially depends on the degree of anisotropy of the electronic structure. The present theoretical findings explain the phenomenology observed in the $\theta$-ET$_2$X charge ordering materials as they fall out of equilibrium. The approach devised here can be easily generalized to address other systems where charge frustration is lifted by quantum fluctuations.