Doping dependence of ordered phases and emergent quasiparticles in the doped Hubbard-Holstein model
- SLAC National Accelerator Lab. and Stanford Univ., Menlo Park, CA (United States)
- New Jersey Institute of Technology, Newark, NJ (United States)
- SLAC National Accelerator Lab. and Stanford Univ., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
- The Univ. of Tennessee, Knoxville, TN (United States)
- SLAC National Accelerator Lab. and Stanford Univ., Menlo Park, CA (United States); Univ. of North Dakota, Grand Forks, ND (United States)
Here, 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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; AC02-76SF00515
- OSTI ID:
- 1418088
- Alternate ID(s):
- OSTI ID: 1409867
- Journal Information:
- Physical Review B, Vol. 96, Issue 20; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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