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This content will become publicly available on November 15, 2018

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

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.
Authors:
 [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)
Publication Date:
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 20; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1418088
Alternate Identifier(s):
OSTI ID: 1409867