Journal Article

PreJuSER-7687

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Mott transition in two-dimensional frustrated compounds

Liebsch, A.FZJ* ; Ishida, H. ; Merino, J.

2009
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/11008  doi:10.1103/PhysRevB.79.195108

Abstract: The phase diagrams of isotropic and anisotropic triangular lattices with local Coulomb interactions are evaluated within cluster dynamical mean-field theory. As a result of partial geometric frustration in the anisotropic lattice, short-range correlations are shown to give rise to re-entrant behavior which is absent in the fully frustrated isotropic limit. The qualitative features of the phase diagrams including the critical temperatures are in good agreement with experimental data for the layered organic charge-transfer salts kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl and kappa-(BEDT-TTF)(2)Cu-2(CN)(3).

Keyword(s): J ; frustration (auto) ; Hubbard model (auto) ; magnetic anisotropy (auto) ; magnetic transitions (auto) ; metal-insulator transition (auto)

Note: Computational work (A.L.) was carried out on the Juelich JUMP. J. M. thanks MCI for financial support under Grant No. CTQ2008-06720-C02-02/BQU.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IFF-1)

Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2009

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