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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2304.00846 |
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| _version_ | 1866911766554869760 |
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| author | Yoshizawa, Shunsuke Sagisaka, Keisuke Sakata, Hideaki |
| author_facet | Yoshizawa, Shunsuke Sagisaka, Keisuke Sakata, Hideaki |
| contents | The charge density wave (CDW) state of 2H-NbSe$_2$ features commensurate domains separated by domain boundaries accompanied by phase slips known as discommensurations. We have unambiguously visualized the structure of CDW domains using a displacement-field measurement algorithm on a scanning tunneling microscopy image. Each CDW domain is delimited by three vertices and three edges of discommensurations and is designated by a triplet of integers whose sum identifies the types of commensurate structure. The observed structure is consistent with the alternating triangular tiling pattern predicted by a phenomenological Landau theory. The domain shape is affected by crystal defects and also by topological defects in the CDW phase factor. Our results provide a foundation for a complete understanding of the CDW state and its relation to the superconducting state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2304_00846 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Visualization of alternating triangular domains of charge density waves in 2H-NbSe$_2$ by scanning tunneling microscopy Yoshizawa, Shunsuke Sagisaka, Keisuke Sakata, Hideaki Strongly Correlated Electrons Materials Science The charge density wave (CDW) state of 2H-NbSe$_2$ features commensurate domains separated by domain boundaries accompanied by phase slips known as discommensurations. We have unambiguously visualized the structure of CDW domains using a displacement-field measurement algorithm on a scanning tunneling microscopy image. Each CDW domain is delimited by three vertices and three edges of discommensurations and is designated by a triplet of integers whose sum identifies the types of commensurate structure. The observed structure is consistent with the alternating triangular tiling pattern predicted by a phenomenological Landau theory. The domain shape is affected by crystal defects and also by topological defects in the CDW phase factor. Our results provide a foundation for a complete understanding of the CDW state and its relation to the superconducting state. |
| title | Visualization of alternating triangular domains of charge density waves in 2H-NbSe$_2$ by scanning tunneling microscopy |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2304.00846 |