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TT: Fachverband Tiefe Temperaturen
TT 22: Low-Dimensional Systems: Charge Order
TT 22.6: Vortrag
Montag, 31. März 2014, 16:15–16:30, BEY 81
Charge ordered metals on the triangular extended Hubbard model — •Luca Fausto Tocchio1,2, Claudius Gros1, Xue-Feng Zhang3, and Sebastian Eggert3 — 1University of Frankfurt, Germany — 2SISSA, Trieste, Italy — 3University of Kaiserslautern, Germany
We study the extended Hubbard model on the triangular lattice as a function of filling and interaction strength. The complex interplay of kinetic frustration and strong interactions on the triangular lattice leads to exotic phases where long range charge order and a finite metallic conductivity coexist. Variational Monte Carlo simulations show that two kinds of ordered metallic states are stable as function of nearest neighbor interaction and filling; in one of the two phases we observe separation into two classes of particles: one of them contributes to stable order, while the other one forms a partially filled band on the remaining substructure. The relation to charge ordering in charge transfer salts is discussed.