Phase Diagram of Pyrochlore Iridates: All-in-All-out Magnetic Ordering and Non-Fermi-Liquid Properties.
Open accessAbstract
We study the prototype 5d pyrochlore iridate Y_{2}Ir_{2}O_{7} from first principles using the local density approximation and dynamical mean-field theory (LDA+DMFT). We map out the phase diagram in the space of temperature, on-site Coulomb repulsion U, and filling. Consistent with experiments, we find that an all-in-all-out ordered insulating phase is stable for realistic values of U. The trigonal crystal field enhances the hybridization between the j_{eff}=1/2 and j_{eff}=3/2 states, and strong interband correlations are induced by the Coulomb interaction, which indicates that a three-band description is important. We demonstrate a substantial band narrowing in the paramagnetic metallic phase and non-Fermi-liquid behavior in the electron- or hole-doped system originating from long-lived quasi-spin-moments induced by nearly flat bands.
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Some numerical studies indicate a direct first-order transition between metallic and insulating states in pyrochlore iridates.
“This WSM remains to be found experimentally (Nakayama et al. , 2016) and some numerical studies indicate a direct first order transition between metallic and insulating states (Shinaoka et al. , 2015).”
From Weyl and Dirac semimetals in three-dimensional solids (2018) · cites this paper as Shinaoka et al., 2015
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Wan, X., Turner, A. M., Vishwanath, A., & Savrasov, S. Y. (2011) · Physical Review B · doi:10.1103/physrevb.83.205101 · Cited by 4,718 · see citing works
Non-Fermi-liquid and topological states with strong spin-orbit coupling.
Moon, E.-G., Xu, C., Kim, Y. B., & Balents, L. (2013) · Physical Review Letters · doi:10.1103/physrevlett.111.206401 · Cited by 260 · see citing works
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Weyl and Dirac semimetals in three-dimensional solids
Armitage, N. P., Mele, E. J., & Vishwanath, A. (2018) · Reviews of Modern Physics · doi:10.1103/revmodphys.90.015001 · Cited by 4,528 · see citing works
“This WSM remains to be found experimentally (Nakayama et al., 2016) and some numerical studies indicate a direct first order transition between metallic and insulating states (Shinaoka et al., 2015).”
BackgroundField-induced quantum metal–insulator transition in the pyrochlore iridate Nd2Ir2O7
Tian, Z., Kohama, Y., Tomita, T., Ishizuka, H., Hsieh, T. H., Ishikawa, J. J., Kindo, K., Balents, L., & Nakatsuji, S. (2016) · Nature Physics · doi:10.1038/nphys3567 · Cited by 145 · see citing works
Weyl and Dirac Semimetals in Three Dimensional Solids
Armitage, N. P., Mele, E. J., & Vishwanath, A. (2017) · arXiv
“This WSM remains to be found experimentally (Nakayama et al., 2016) and some numerical studies indicate a direct first order transition between metallic and insulating states (Shinaoka et al., 2015).”
Background
- Authors
- Shinaoka, H., Hoshino, S., Troyer, M., & Werner, P.
- Affiliations
- University of Fribourg (CH)
- ETH Zurich (CH)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2015-10-07
- Volume
- 115
- Issue
- 15
- Pages
- 156401-156401
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2155302803
- Cited by
- 82
- References
- 2
- Citations by year
- 2026: 4 · 2025: 5 · 2024: 6 · 2023: 4 · 2022: 4 · 2021: 9 · 2020: 8 · 2019: 10 · 2018: 5 · 2017: 18 · 2016: 7 · 2015: 2
- FWCI
- 6.66
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- arXiv (Cornell University) (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University)
- Funders
- Deutsche Forschungsgemeinschaft
- Schweizerische Nationalfonds zur Förderung der Wissenschaftlichen Forschung (200021E-149122)
- European Research Council
- Topics
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Rare-earth and actinide compounds
- Keywords
- pyrochlore iridates, non-Fermi-liquid behavior, phase diagram, on-site Coulomb interaction, trigonal crystal field, band correlation, three-band model, band narrowing, flat bands, electron and hole doping
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