Higher-order topological Mott insulator on the pyrochlore lattice
Abstract We provide the first unbiased evidence for a higher-order topological Mott insulator in three dimensions by numerically exact quantum Monte Carlo simulations. This insulating phase is adiabatically connected to a third-order topological insulator in the noninteracting limit, which features...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2021-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-99213-z |
| _version_ | 1818355739095203840 |
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| author | Yuichi Otsuka Tsuneya Yoshida Koji Kudo Seiji Yunoki Yasuhiro Hatsugai |
| author_facet | Yuichi Otsuka Tsuneya Yoshida Koji Kudo Seiji Yunoki Yasuhiro Hatsugai |
| author_sort | Yuichi Otsuka |
| collection | DOAJ |
| description | Abstract We provide the first unbiased evidence for a higher-order topological Mott insulator in three dimensions by numerically exact quantum Monte Carlo simulations. This insulating phase is adiabatically connected to a third-order topological insulator in the noninteracting limit, which features gapless modes around the corners of the pyrochlore lattice and is characterized by a $${\mathbb {Z}}_{4}$$ Z 4 spin-Berry phase. The difference between the correlated and non-correlated topological phases is that in the former phase the gapless corner modes emerge only in spin excitations being Mott-like. We also show that the topological phase transition from the third-order topological Mott insulator to the usual Mott insulator occurs when the bulk spin gap solely closes. |
| first_indexed | 2024-12-13T19:46:06Z |
| format | Article |
| id | doaj.art-6dab6a7fd9b3409cbcb0b6bbc872ef24 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-13T19:46:06Z |
| publishDate | 2021-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-6dab6a7fd9b3409cbcb0b6bbc872ef242022-12-21T23:33:33ZengNature PortfolioScientific Reports2045-23222021-10-011111710.1038/s41598-021-99213-zHigher-order topological Mott insulator on the pyrochlore latticeYuichi Otsuka0Tsuneya Yoshida1Koji Kudo2Seiji Yunoki3Yasuhiro Hatsugai4Computational Materials Science Research Team, RIKEN Center for Computational Science (R-CCS)Graduate School of Pure and Applied Sciences, University of TsukubaDepartment of Physics, University of TsukubaComputational Materials Science Research Team, RIKEN Center for Computational Science (R-CCS)Graduate School of Pure and Applied Sciences, University of TsukubaAbstract We provide the first unbiased evidence for a higher-order topological Mott insulator in three dimensions by numerically exact quantum Monte Carlo simulations. This insulating phase is adiabatically connected to a third-order topological insulator in the noninteracting limit, which features gapless modes around the corners of the pyrochlore lattice and is characterized by a $${\mathbb {Z}}_{4}$$ Z 4 spin-Berry phase. The difference between the correlated and non-correlated topological phases is that in the former phase the gapless corner modes emerge only in spin excitations being Mott-like. We also show that the topological phase transition from the third-order topological Mott insulator to the usual Mott insulator occurs when the bulk spin gap solely closes.https://doi.org/10.1038/s41598-021-99213-z |
| spellingShingle | Yuichi Otsuka Tsuneya Yoshida Koji Kudo Seiji Yunoki Yasuhiro Hatsugai Higher-order topological Mott insulator on the pyrochlore lattice Scientific Reports |
| title | Higher-order topological Mott insulator on the pyrochlore lattice |
| title_full | Higher-order topological Mott insulator on the pyrochlore lattice |
| title_fullStr | Higher-order topological Mott insulator on the pyrochlore lattice |
| title_full_unstemmed | Higher-order topological Mott insulator on the pyrochlore lattice |
| title_short | Higher-order topological Mott insulator on the pyrochlore lattice |
| title_sort | higher order topological mott insulator on the pyrochlore lattice |
| url | https://doi.org/10.1038/s41598-021-99213-z |
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