Doping dependence of ordered phases and emergent quasiparticles in the doped Hubbard-Holstein model
Document Type
Article
Publication Date
11-22-2017
Abstract
We present determinant quantum Monte Carlo simulations of the hole-doped single-band Hubbard-Holstein model on a square lattice, to investigate how quasiparticles emerge when doping a Mott insulator (MI) or a Peierls insulator (PI). The MI regime at large Hubbard interaction U and small relative e-ph coupling strength λ is quickly suppressed upon doping, by drawing spectral weight from the upper Hubbard band and shifting the lower Hubbard band towards the Fermi level, leading to a metallic state with emergent quasiparticles at the Fermi level. On the other hand, the PI regime at large λ and small U persists out to relatively high doping levels. We study the evolution of the d-wave superconducting susceptibility with doping, and find that it increases with lowering temperature in a regime of intermediate values of U and λ.
Identifier
85039934590 (Scopus)
Publication Title
Physical Review B
External Full Text Location
https://doi.org/10.1103/PhysRevB.96.205141
e-ISSN
24699969
ISSN
24699950
Issue
20
Volume
96
Grant
DE-AC02-05CH11231
Fund Ref
U.S. Department of Energy
Recommended Citation
Mendl, C. B.; Nowadnick, E. A.; Huang, E. W.; Johnston, S.; Moritz, B.; and Devereaux, T. P., "Doping dependence of ordered phases and emergent quasiparticles in the doped Hubbard-Holstein model" (2017). Faculty Publications. 9185.
https://digitalcommons.njit.edu/fac_pubs/9185