Equilibrium Stabilization of a Hidden Phase Like Metallic State in 1T-TaS2
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866916035893919744 |
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| author | Yilmaz, Turgut Rajapitamahuni, Anil Park, Suji Jang, Houk Kundu, Asish K. Vescovo, Elio |
| author_facet | Yilmaz, Turgut Rajapitamahuni, Anil Park, Suji Jang, Houk Kundu, Asish K. Vescovo, Elio |
| contents | Electronic phases that lie outside the equilibrium ground state offer a route to explore competing configurations in correlated materials. In 1T-TaS2, ultrafast excitation accesses a metallic hidden phase that is distinct from the commensurate insulating ground state. Here we use angle-resolved photoemission spectroscopy to show that an equivalent electronic configuration is stabilized in exfoliated intermediate-thickness 1T-TaS2 flakes, where it persists up to room temperature before evolving through a different sequence of electronic transitions. This equilibrium hidden-phase-like state hosts a metallic band with finite Fermi-level spectral weight while retaining the characteristic hybridization gaps associated with the star-of-David band folding. These results establish a platform for controlling competing electronic states in layered materials, with implications for both quantum science and phase change technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_22292 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Equilibrium Stabilization of a Hidden Phase Like Metallic State in 1T-TaS2 Yilmaz, Turgut Rajapitamahuni, Anil Park, Suji Jang, Houk Kundu, Asish K. Vescovo, Elio Strongly Correlated Electrons Materials Science Electronic phases that lie outside the equilibrium ground state offer a route to explore competing configurations in correlated materials. In 1T-TaS2, ultrafast excitation accesses a metallic hidden phase that is distinct from the commensurate insulating ground state. Here we use angle-resolved photoemission spectroscopy to show that an equivalent electronic configuration is stabilized in exfoliated intermediate-thickness 1T-TaS2 flakes, where it persists up to room temperature before evolving through a different sequence of electronic transitions. This equilibrium hidden-phase-like state hosts a metallic band with finite Fermi-level spectral weight while retaining the characteristic hybridization gaps associated with the star-of-David band folding. These results establish a platform for controlling competing electronic states in layered materials, with implications for both quantum science and phase change technologies. |
| title | Equilibrium Stabilization of a Hidden Phase Like Metallic State in 1T-TaS2 |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2605.22292 |