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February 12, 2026Applied Physics Letters

Interlayer coupling driven phase evolution in hyperbolic 1 T -TaS2 revealed by spectroscopic ellipsometry

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Authors

ATA. TiwariBGBruno GompfMDMartin Dressel

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Overview

This work reveals phase transitions in 1T-TaS2, indicating interlayer coupling influences characteristics of its phases.

Key Points

  • The study aims to understand how interlayer coupling affects phase transitions in 1T-TaS2.
  • Used spectroscopic ellipsometry to analyze the dielectric response of bulk 1T-TaS2.
  • Performed temperature-dependent studies from room temperature to the insulating state.
  • Employed anisotropic Bruggeman effective medium analysis to interpret results.
  • Identified natural hyperbolic behavior in room-temperature dielectric response.
  • Revealed evolution of metallic domains from disk-like to needlelike during heating.
  • Found an additional intermediate phase during the transition process.

Cite This Study

Tiwari et al. (2026) studied this question.

synapsesocial.com/papers/698d6f0d5be6419ac0d5527bhttps://doi.org/10.1063/5.0315654
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