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Title: Doping dependence of ordered phases and emergent quasiparticles in the doped Hubbard-Holstein model

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4];  [5];  [1]
  1. SLAC National Accelerator Lab. and Stanford Univ., Menlo Park, CA (United States)
  2. New Jersey Institute of Technology, Newark, NJ (United States)
  3. SLAC National Accelerator Lab. and Stanford Univ., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
  4. The Univ. of Tennessee, Knoxville, TN (United States)
  5. 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
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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