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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2407.05535 |
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| _version_ | 1866909580805537792 |
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| author | Nitzav, Yuval Gofman, Roni Mangel, Ilay Dishi, Abigail Ragoler, Nitzan P., Sajilesh K. Jarach, Yaron Louat, Alex Watson, Matthew D. Cacho, Cephise Feldman, Irena Kanigel, Amit |
| author_facet | Nitzav, Yuval Gofman, Roni Mangel, Ilay Dishi, Abigail Ragoler, Nitzan P., Sajilesh K. Jarach, Yaron Louat, Alex Watson, Matthew D. Cacho, Cephise Feldman, Irena Kanigel, Amit |
| contents | The origin of the insulating state in 1T-TaS$_2$ has long been a subject of debate. A short current pulse transforms this insulating state into a metastable metallic phase. Using micro-ARPES, we investigate the electronic structure of this phase and uncover spatially dependent modifications caused by the current pulse. In some regions of the sample, a Fermi surface emerges, while others remain gapped. Detailed band structure analysis reveals that the metallic regions exhibit an electronic structure similar to that observed in the high-temperature phase of 1T-TaS$_2$, characterized by suppressed energy gaps and bands crossing the Fermi level. Furthermore, the metallic and insulating regions display distinct dispersions along the out-of-plane direction. These observations suggest a scenario in which the current pulse breaks the star-of-David dimers characteristic of the insulating phase, implicating these dimers as the likely origin of the insulating behavior in 1T-TaS$_2$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_05535 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Emergence of a Fermi-surface in the current-driven Hidden state of 1T-TaS$_2$ Nitzav, Yuval Gofman, Roni Mangel, Ilay Dishi, Abigail Ragoler, Nitzan P., Sajilesh K. Jarach, Yaron Louat, Alex Watson, Matthew D. Cacho, Cephise Feldman, Irena Kanigel, Amit Strongly Correlated Electrons Mesoscale and Nanoscale Physics The origin of the insulating state in 1T-TaS$_2$ has long been a subject of debate. A short current pulse transforms this insulating state into a metastable metallic phase. Using micro-ARPES, we investigate the electronic structure of this phase and uncover spatially dependent modifications caused by the current pulse. In some regions of the sample, a Fermi surface emerges, while others remain gapped. Detailed band structure analysis reveals that the metallic regions exhibit an electronic structure similar to that observed in the high-temperature phase of 1T-TaS$_2$, characterized by suppressed energy gaps and bands crossing the Fermi level. Furthermore, the metallic and insulating regions display distinct dispersions along the out-of-plane direction. These observations suggest a scenario in which the current pulse breaks the star-of-David dimers characteristic of the insulating phase, implicating these dimers as the likely origin of the insulating behavior in 1T-TaS$_2$. |
| title | Emergence of a Fermi-surface in the current-driven Hidden state of 1T-TaS$_2$ |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2407.05535 |