Fidelity study of superconductivity in extended Hubbard models
Abstract
The Hubbard model with local on-site repulsion is generally thought to possess a superconducting ground state for appropriate parameters, but the effects of more realistic long-range Coulomb interactions have not been studied extensively. We study the influence of these interactions on superconductivity by including nearest- and next-nearest-neighbor extended Hubbard interactions in addition to the usual on-site terms. Utilizing numerical exact diagonalization, we analyze the signatures of superconductivity in the ground states through the fidelity metric of quantum information theory. Finally, we find that nearest and next-nearest neighbor interactions have thresholds above which they destabilize superconductivity regardless of whether they are attractive or repulsive, seemingly due to competing charge fluctuations.
- Authors:
-
- Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of North Dakota, Grand Forks, ND (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1335092
- Alternate Identifier(s):
- OSTI ID: 1198624
- Report Number(s):
- SLAC-PUB-16742
Journal ID: ISSN 1098-0121; PRBMDO; arXiv:1505.01127
- Grant/Contract Number:
- AC02-76SF00515; SC0007091; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 2; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; MATSCI
Citation Formats
Plonka, N., Jia, C. J., Wang, Y., Moritz, B., and Devereaux, T. P. Fidelity study of superconductivity in extended Hubbard models. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.92.024503.
Plonka, N., Jia, C. J., Wang, Y., Moritz, B., & Devereaux, T. P. Fidelity study of superconductivity in extended Hubbard models. United States. https://doi.org/10.1103/PhysRevB.92.024503
Plonka, N., Jia, C. J., Wang, Y., Moritz, B., and Devereaux, T. P. Wed .
"Fidelity study of superconductivity in extended Hubbard models". United States. https://doi.org/10.1103/PhysRevB.92.024503. https://www.osti.gov/servlets/purl/1335092.
@article{osti_1335092,
title = {Fidelity study of superconductivity in extended Hubbard models},
author = {Plonka, N. and Jia, C. J. and Wang, Y. and Moritz, B. and Devereaux, T. P.},
abstractNote = {The Hubbard model with local on-site repulsion is generally thought to possess a superconducting ground state for appropriate parameters, but the effects of more realistic long-range Coulomb interactions have not been studied extensively. We study the influence of these interactions on superconductivity by including nearest- and next-nearest-neighbor extended Hubbard interactions in addition to the usual on-site terms. Utilizing numerical exact diagonalization, we analyze the signatures of superconductivity in the ground states through the fidelity metric of quantum information theory. Finally, we find that nearest and next-nearest neighbor interactions have thresholds above which they destabilize superconductivity regardless of whether they are attractive or repulsive, seemingly due to competing charge fluctuations.},
doi = {10.1103/PhysRevB.92.024503},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 2,
volume = 92,
place = {United States},
year = {Wed Jul 08 00:00:00 EDT 2015},
month = {Wed Jul 08 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Charge ordering and nonlocal correlations in the doped extended Hubbard model
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