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Title: Doping evolution of spin and charge excitations in the Hubbard model

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [3];  [4];  [5];  [6];  [7]
  1. Stanford Univ., CA (United States). Dept. of Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  2. Stanford Univ., CA (United States). Dept. of Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Cornell Univ., Ithaca, NY (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Dept. of Applied Physics
  4. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Applied Physics; Univ. of Tennessee, Knoxville, TN (United States). Joint Institute for Advanced Materials
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Univ. of North Dakota, Grand Forks, ND (United States)
  6. Univ. of California, Davis, CA (United States). Dept. of Physics
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
+ Show Author Affiliations

We shed light on how electronic correlations vary across the phase diagram of the cuprate superconductors, examining the doping evolution of spin and charge excitations in the single-band Hubbard model using determinant quantum Monte Carlo (DQMC). In the single-particle response, we observe that the effects of correlations weaken rapidly with doping, such that one may expect the random phase approximation (RPA) to provide an adequate description of the two-particle response. In contrast, when compared to RPA, we find that significant residual correlations in the two-particle excitations persist up to 40% hole and 15% electron doping (the range of dopings achieved in the cuprates). Ultimately, these fundamental differences between the doping evolution of single- and multi-particle renormalizations show that conclusions drawn from single-particle processes cannot necessarily be applied to multi-particle excitations. Eventually, the system smoothly transitions via a momentum-dependent crossover into a weakly correlated metallic state where the spin and charge excitation spectra exhibit similar behavior and where RPA provides an adequate description.

Research Organization:
Univ. of California, Davis, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515; AC02-05CH11231; 1147470
OSTI ID:
1253321
Alternate ID(s):
OSTI ID: 1225248
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 19; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (5)

Quantum spin fluctuations and evolution of electronic structure in cuprates journal October 2018
Spin excitation spectrum of high-temperature cuprate superconductors from finite cluster simulations journal September 2018
Decrease of d-wave pairing strength in spite of the persistence of magnetic excitations in the overdoped Hubbard model text January 2017
Numerically exploring the 1D-2D dimensional crossover on spin dynamics in the doped Hubbard model text January 2017
Spin excitation spectrum of high-temperature cuprate superconductors from finite cluster simulations text January 2017

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS