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5 papers · 2 filters
Quantum Phase Transitions in Alternating-Bond Mixed Diamond Chains with Spins 1 and 1/2
Kazuo Hida, Ken'ichi Takano, Hidenori Suzuki
We investigate the mixed diamond chain composed of spins 1 and 1/2 when the exchange interaction is alternatingly distorted. Depending on the strengths of frustration and distortio…
Fermi-liquid, non-Fermi-liquid, and Mott phases in iron pnictides and cuprates
Hiroshi Ishida, Ansgar Liebsch
The role of Coulomb correlations in the iron pnictide LaFeAsO is studied by generalizing exact diagonalization dynamical mean field theory to five orbitals. For rotationally invari…
Role of anion size, magnetic moment, and disorder on the properties of the organic conductor kappa-(BETS)_2Ga_{1-x}Fe_{x}Cl_{4-y}_Br_{y}
E. Steven, H. B. Cui, A. Kismarahardja +3
Shubnikov-de Haas and angular dependent magnetoresistance oscillations have been used to explore the role of anion size, magnetic moment, and disorder in the organic conductors kap…
Mossbauer spectroscopy study of the "mysterious" magnetic transition in lambda-(BETS)2FeCl4
J. C. Waerenborgh, S. Rabaca, M. Almeida +3
The compound lambda-(BETS)2FeCl4 provides an effective demonstration of the interaction of pi-conduction electron and d-electron localized moment systems in molecular crystalline m…
Mott transition in two-dimensional frustrated compounds
A. Liebsch, H. Ishida, J. Merino
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…