Doping evolution of spin and charge excitations in the Hubbard model
- 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)
- 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)
- 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
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Applied Physics; Univ. of Tennessee, Knoxville, TN (United States). Joint Institute for Advanced Materials
- 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)
- Univ. of California, Davis, CA (United States). Dept. of Physics
- 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
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
Web of Science
Quantum spin fluctuations and evolution of electronic structure in cuprates
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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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