Charge-density wave associated with higher-order Fermi-surface nesting in monolayer VS2
Abstract Fermi-surface (FS) nesting originating from Peierls’ idea of electronic instabilities in one-dimensional materials is a key concept to stabilize charge-density wave (CDW), whereas its applicability to two-dimensional (2D) materials is under intensive debate. Here we report unusual CDW assoc...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-05-01
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| Series: | npj 2D Materials and Applications |
| Online Access: | https://doi.org/10.1038/s41699-023-00395-z |
| _version_ | 1797832040274460672 |
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| author | Tappei Kawakami Katsuaki Sugawara Hirofumi Oka Kosuke Nakayama Ken Yaegashi Seigo Souma Takashi Takahashi Tomoteru Fukumura Takafumi Sato |
| author_facet | Tappei Kawakami Katsuaki Sugawara Hirofumi Oka Kosuke Nakayama Ken Yaegashi Seigo Souma Takashi Takahashi Tomoteru Fukumura Takafumi Sato |
| author_sort | Tappei Kawakami |
| collection | DOAJ |
| description | Abstract Fermi-surface (FS) nesting originating from Peierls’ idea of electronic instabilities in one-dimensional materials is a key concept to stabilize charge-density wave (CDW), whereas its applicability to two-dimensional (2D) materials is under intensive debate. Here we report unusual CDW associated with the higher-order FS nesting in monolayer 2D VS2. Angle-resolved photoemission spectroscopy and scanning tunneling microscopy uncovered stripe CDW with $$\sqrt {21} R10.9^\circ \times \sqrt 3 R30^\circ$$ 21 R 10 . 9 ∘ × 3 R 3 0 ∘ periodicity together with an energy-gap opening on the entire FS. We suggest that this CDW involves the higher-order FS-nesting vector 2q twice larger than that of the normal one (q), as supported by the anomalies in the calculated phonon dispersion and electronic susceptibility. The present results suggest that the cooperation of q and 2q nesting leads to the fully gapped CDW state unlike the case of conventional single q nesting which produces a partial gap, pointing to an intriguing mechanism of CDW transition. |
| first_indexed | 2024-04-09T14:02:27Z |
| format | Article |
| id | doaj.art-a63f8c5a2a7a4e58bd416305952e73ed |
| institution | Directory Open Access Journal |
| issn | 2397-7132 |
| language | English |
| last_indexed | 2024-04-09T14:02:27Z |
| publishDate | 2023-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj 2D Materials and Applications |
| spelling | doaj.art-a63f8c5a2a7a4e58bd416305952e73ed2023-05-07T11:14:50ZengNature Portfolionpj 2D Materials and Applications2397-71322023-05-01711910.1038/s41699-023-00395-zCharge-density wave associated with higher-order Fermi-surface nesting in monolayer VS2Tappei Kawakami0Katsuaki Sugawara1Hirofumi Oka2Kosuke Nakayama3Ken Yaegashi4Seigo Souma5Takashi Takahashi6Tomoteru Fukumura7Takafumi Sato8Department of Physics, Graduate School of Science, Tohoku UniversityDepartment of Physics, Graduate School of Science, Tohoku UniversityAdvanced Institute for Materials Research (WPI-AIMR), Tohoku UniversityDepartment of Physics, Graduate School of Science, Tohoku UniversityDepartment of Physics, Graduate School of Science, Tohoku UniversityAdvanced Institute for Materials Research (WPI-AIMR), Tohoku UniversityDepartment of Physics, Graduate School of Science, Tohoku UniversityAdvanced Institute for Materials Research (WPI-AIMR), Tohoku UniversityDepartment of Physics, Graduate School of Science, Tohoku UniversityAbstract Fermi-surface (FS) nesting originating from Peierls’ idea of electronic instabilities in one-dimensional materials is a key concept to stabilize charge-density wave (CDW), whereas its applicability to two-dimensional (2D) materials is under intensive debate. Here we report unusual CDW associated with the higher-order FS nesting in monolayer 2D VS2. Angle-resolved photoemission spectroscopy and scanning tunneling microscopy uncovered stripe CDW with $$\sqrt {21} R10.9^\circ \times \sqrt 3 R30^\circ$$ 21 R 10 . 9 ∘ × 3 R 3 0 ∘ periodicity together with an energy-gap opening on the entire FS. We suggest that this CDW involves the higher-order FS-nesting vector 2q twice larger than that of the normal one (q), as supported by the anomalies in the calculated phonon dispersion and electronic susceptibility. The present results suggest that the cooperation of q and 2q nesting leads to the fully gapped CDW state unlike the case of conventional single q nesting which produces a partial gap, pointing to an intriguing mechanism of CDW transition.https://doi.org/10.1038/s41699-023-00395-z |
| spellingShingle | Tappei Kawakami Katsuaki Sugawara Hirofumi Oka Kosuke Nakayama Ken Yaegashi Seigo Souma Takashi Takahashi Tomoteru Fukumura Takafumi Sato Charge-density wave associated with higher-order Fermi-surface nesting in monolayer VS2 npj 2D Materials and Applications |
| title | Charge-density wave associated with higher-order Fermi-surface nesting in monolayer VS2 |
| title_full | Charge-density wave associated with higher-order Fermi-surface nesting in monolayer VS2 |
| title_fullStr | Charge-density wave associated with higher-order Fermi-surface nesting in monolayer VS2 |
| title_full_unstemmed | Charge-density wave associated with higher-order Fermi-surface nesting in monolayer VS2 |
| title_short | Charge-density wave associated with higher-order Fermi-surface nesting in monolayer VS2 |
| title_sort | charge density wave associated with higher order fermi surface nesting in monolayer vs2 |
| url | https://doi.org/10.1038/s41699-023-00395-z |
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