Spectral functions in itinerant electron systems with geometrical frustration

Abstract

The Hubbard model with geometrical frustration is investigated in a metallic phase close to half-filling. We calculate the single particle spectral function for the triangular lattice within dynamical cluster approximation, which is further combined with non-crossing approximation and fluctuation exchange approximation to treat the resulting cluster Anderson model. It is shown that frustration due to non-local correlations suppresses short-range antiferromagnetic fluctuations and thereby assists the formation of heavy quasi-particles near half-filling.

4 pages, 5 eps figures

References in corpus (3)

• A Quantum Monte Carlo algorithm for non-local corrections to the Dynamical Mean-Field Approximation
• Magnetic and Metal-Insulator Transitions through Bandwidth Control in Two-Dimensional Hubbard Models with Nearest and Next-Nearest Neighbor Transfers
• Mott transition and heavy fermion state in the pyrochlore Hubbard model

Cited by in corpus (19)

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• Dynamical mean field study of the Mott transition in the half-filled Hubbard model on a triangular lattice
• Multisite versus multiorbital Coulomb correlations studied within finite-temperature exact diagonalization dynamical mean-field theory
• Study of the Hubbard model on the triangular lattice using dynamical cluster approximation and dual fermion methods
• Mott transition in two-dimensional frustrated compounds
• Low-energy excitations of the Hubbard model on the Kagomé lattice
• Mott transition in the Hubbard model on the anisotropic kagomé lattice
• Mottness on a triangular lattice
• Optical investigations on $Y_{2-x}B{i}_{x}R{u}_2{O}_7$: Electronic structure evolutions related to the metal-insulator transition
• Mott transition and Antiferromagnetic Metal on Shastry-Sutherland Lattice
• Effects of frustration on the nonequilibrium dynamics of photo-excited lattice systems
• Spatial fluctuations of spin and orbital in two-orbital Hubbard model
• Mott transition in two-band fermion model with on-site Coulomb repulsion
• Electronic properties of disordered corner-sharing tetrahedral lattices
• Spin-orbital liquids and insulator-metal transitions on the pyrochlore lattice
• Metallic State of the Three-band Hubbard Model with Super-lattice Structure