Geometrically-Frustrated Pseudogap Phase of Coulomb Liquids

Details Geometrically-Frustrated Pseudogap Phase of Coulomb Liquids Geometrically-Frustrated Pseudogap Phase of Coulomb Liquids

2011-09-20

arxiv.org/abs/1109.4199v1

Physica B, Volume 407, Issue 11, 1 June 2012, Pages 1711-1714

Physics

Condensed Matter

Strongly Correlated Electrons

Proceeding of ECRYS 2011, Corsica, France, and will be published in Physica B, Elsevier

Scientific paper

10.1016/j.bbr.2011.03.031

We study a class of models with long-range repulsive interactions of the generalized Coulomb form $V(r)\sim 1/r^{\alpha}$. We show that decreasing the interaction exponent in the regime $\alpha < d$ dramatically depresses the charge ordering temperature $T_c$ in any dimension $d\ge 2$, reflecting the strong geometric frustration produced by long-range interactions. A nearly frozen Coulomb liquid then survives in a broad pseudogap phase found at $T > T_c$, which is characterized by an unusual temperature dependence of all quantities. In contrast, the leading critical behavior very close to the charge-ordering temperature remains identical as in models with short-range interactions.

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