Doublon Dynamics of the Hubbard Model on Triangular Lattice

Abstract

We study the dynamics of doublon in the half-filled Hubbard model on the triangular lattice by using the cellular dynamical mean field theory. Investigating the nearest-neighbor dynamical correlations, we demonstrate that a nearest-neighbor doublon-holon pair shows a strong attraction, in particular in the insulating phase. We also calculate the on-site dynamical correlation of doublon and find that the life time of doublon is longer in the metallic phase than in the insulating phase. In the long-time region, the metallic phase has persistent fluctuations in various nearest-neighbor configurations, while the fluctuations are vanishingly small in the insulating phase. Obtained results indicate clear differences of dynamics of doublon between in the metallic and in the insulating phases.

arXiv comment4 pages, 3 figures

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• Dynamical slave-boson mean-field study of the Mott transition in the Hubbard model in the large-$z$ limit
• Dynamic charge Kondo effect and a slave fermion approach to the Mott transition
• Slave fermion interpretation of the pseudogap in doped Mott insulators