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• W2734854871 abstract "In this article, we discuss the nontrivial collective charge excitations (plasmons) of the extended square lattice Hubbard model. Using a fully nonperturbative approach, we employ the hybrid Monte Carlo algorithm to simulate the system at half-filling. A modified Backus-Gilbert method is introduced to obtain the spectral functions via numerical analytic continuation. We directly compute the single-particle density of states which demonstrates the formation of Hubbard bands in the strongly correlated phase. The momentum-resolved charge susceptibility also is computed on the basis of the Euclidean charge-density-density correlator. In agreement with previous extended dynamical mean-field theory studies, we find that, at high strength of the electron-electron interaction, the plasmon dispersion develops two branches." @default.
• W2734854871 created "2017-07-21" @default.
• W2734854871 creator A5009587987 @default.
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• W2734854871 date "2017-11-09" @default.
• W2734854871 modified "2023-09-27" @default.
• W2734854871 title "Collective charge excitations and the metal-insulator transition in the square lattice Hubbard-Coulomb model" @default.
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• W2734854871 doi "https://doi.org/10.1103/physrevb.96.205115" @default.
• W2734854871 hasPublicationYear "2017" @default.
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