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Crystals 2012, 2(3), 1155-1200; doi:10.3390/cryst2031155

Theories on Frustrated Electrons in Two-Dimensional Organic Solids

Department of Physics, Kyoto Sangyo University, Kita-ku Kamigamo Motoyama, Kyoto 603-8555, Japan
Received: 28 April 2012 / Revised: 9 July 2012 / Accepted: 26 July 2012 / Published: 20 August 2012
(This article belongs to the Special Issue Molecular Conductors)

Abstract

Two-dimensional quarter-filled organic solids are a promising class of materials to realize the strongly correlated insulating states called dimer Mott insulator and charge order. In their conducting layer, the molecules form anisotropic triangular lattices, harboring geometrical frustration effect, which could give rise to many interesting states of matter in the two insulators and in the metals adjacent to them. This review is concerned with the theoretical studies on such issue over the past ten years, and provides the systematic understanding on exotic metals, dielectrics, and spin liquids, which are the consequences of the competing correlation and fluctuation under frustration.
Keywords: frustration; strongly correlated electron; quantum spin system; dielectrics; triangular lattice frustration; strongly correlated electron; quantum spin system; dielectrics; triangular lattice
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Hotta, C. Theories on Frustrated Electrons in Two-Dimensional Organic Solids. Crystals 2012, 2, 1155-1200.

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