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PreprintCC BY 4.0arXiv

Equilibrium Stabilization of a Hidden Phase Like Metallic State in 1T-TaS2

  • Anil Rajapitamahuni
  • Suji Park
  • Houk Jang
  • Asish K. Kundu
  • Elio Vescovo
  • Turgut Yilmaz
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Abstract

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.

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Cite

BibTeXRIS
BibTeX
@misc{rajapitamahuni2026equilibrium,
  title = {{Equilibrium Stabilization of a Hidden Phase Like Metallic State in 1T-TaS2}},
  author = {Anil Rajapitamahuni and Suji Park and Houk Jang and Asish K. Kundu and Elio Vescovo and Turgut Yilmaz},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2605.22292},
  eprint = {2605.22292},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.22292},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Equilibrium Stabilization of a Hidden Phase Like Metallic State in 1T-TaS2
AU  - Anil Rajapitamahuni
AU  - Suji Park
AU  - Houk Jang
AU  - Asish K. Kundu
AU  - Elio Vescovo
AU  - Turgut Yilmaz
PY  - 2026
DA  - 2026/09/29
PB  - arXiv
DO  - 10.48550/arxiv.2605.22292
UR  - https://arxiv.org/abs/2605.22292
AB  - 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.
ER  -