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Title: d -wave superconductivity in the presence of nearest-neighbor Coulomb repulsion

Abstract

Dynamic cluster quantum Monte Carlo calculations for a doped two-dimensional extended Hubbard model are used to study the stability and dynamics of d-wave pairing when a nearest-neighbor Coulomb repulsion V is present in addition to the on-site Coulomb repulsion U. We find that d-wave pairing and the superconducting transition temperature Tc are only weakly suppressed as long as V does not exceed U/2. This stability is traced to the strongly retarded nature of pairing that allows the d-wave pairs to minimize the repulsive effect of V. When V approaches U/2, large momentum charge fluctuations are found to become important and to give rise to a more rapid suppression of d-wave pairing and T c than for smaller V.

Authors:
 [1];  [1];  [1]; ORCiD logo [2]
  1. ETH Zurich (Switzerland). Inst. for Theoretical Physics
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS). Computational Science and Engineering Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1439922
Alternate Identifier(s):
OSTI ID: 1437512
Grant/Contract Number:  
[AC05-00OR22725]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
[ Journal Volume: 97; Journal Issue: 18]; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 97 MATHEMATICS AND COMPUTING; strongly correlated systems; unconventional superconductors; Hubbard model; many-body techniques

Citation Formats

Jiang, M., Hahner, U. R., Schulthess, T. C., and Maier, T. A. d -wave superconductivity in the presence of nearest-neighbor Coulomb repulsion. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.184507.
Jiang, M., Hahner, U. R., Schulthess, T. C., & Maier, T. A. d -wave superconductivity in the presence of nearest-neighbor Coulomb repulsion. United States. doi:10.1103/PhysRevB.97.184507.
Jiang, M., Hahner, U. R., Schulthess, T. C., and Maier, T. A. Tue . "d -wave superconductivity in the presence of nearest-neighbor Coulomb repulsion". United States. doi:10.1103/PhysRevB.97.184507. https://www.osti.gov/servlets/purl/1439922.
@article{osti_1439922,
title = {d -wave superconductivity in the presence of nearest-neighbor Coulomb repulsion},
author = {Jiang, M. and Hahner, U. R. and Schulthess, T. C. and Maier, T. A.},
abstractNote = {Dynamic cluster quantum Monte Carlo calculations for a doped two-dimensional extended Hubbard model are used to study the stability and dynamics of d-wave pairing when a nearest-neighbor Coulomb repulsion V is present in addition to the on-site Coulomb repulsion U. We find that d-wave pairing and the superconducting transition temperature Tc are only weakly suppressed as long as V does not exceed U/2. This stability is traced to the strongly retarded nature of pairing that allows the d-wave pairs to minimize the repulsive effect of V. When V approaches U/2, large momentum charge fluctuations are found to become important and to give rise to a more rapid suppression of d-wave pairing and Tc than for smaller V.},
doi = {10.1103/PhysRevB.97.184507},
journal = {Physical Review B},
number = [18],
volume = [97],
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 1 work
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Figures / Tables:

FIG. 1: FIG. 1:: (Color online) (a) Temperature dependence of the leading (dx2−y2-wave) eigenvalue λd(T) of the Bethe-Salpeter equation in the particle-particle channel, Eq. (2) for the extended Hubbard model in Eq. (1) with U = 7 and〈n〉 = 0.9 for different magnitudes of the near neighbor Coulomb repulsion V. (b) d-wavemore » eigenvalue λd at fixed temperature T = 0.1 as a function of V for different fillings〈n〉. (c) d-wave superconducting transition temperature Tc extracted from λd(Tc) = 1 as a function of V. d-wave pairing is only weakly suppressed by the interaction V as long as VU/2.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.