Publications
Publication Information
| Title | Collective charge excitations and the metal-insulator transition in the square lattice Hubbard-Coulomb model |
| Authors | Maksim Ulybyshev, Christopher Winterowd, Savvas Zafeiropoulos |
| JLAB number | JLAB-THY-17-2635 |
| LANL number | 1707.04212 |
| Other number | DOE/OR/23177-4342 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Other |
| Other Funding: | NSF grant PHY-1516509 |
|
Journal Compiled for Physical Review B Volume 96 Issue 205115 Refereed | |
| Publication 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. |
| Experiment Numbers: | |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevB.96.205115 |
| Accepted Manuscript: | 1707.04212.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |