Suppression of stripe-ordered structural phases in monolayer IrTe2 by a gold substrate

Abstract

Metal-assisted exfoliation of two-dimensional (2D) materials has emerged as an efficient route to isolating large-area monolayer crystals, yet the influence of the supporting metal substrate on their intrinsic properties remains poorly understood. Here, we demonstrate successful gold-assisted exfoliation of monolayer IrTe ₂ up to the millimeter scale. Angle-resolved photoemission spectroscopy (ARPES), combined with first-principles calculations, reveals that the low-energy electronic structure closely resembles that of a freestanding monolayer 1T-IrTe ₂ . We find that quasi-covalent hybridization together with substrate-induced strain leads to only modest modifications of the electronic bands. Although strain contributes to phase stability, it is essentially hybridization that drives the stabilization of the 1T-phase of the monolayer IrTe ₂ by suppressing stripe-ordered phase transitions. These results establish gold-assisted exfoliation as a robust route to prepare a large-area monolayer IrTe ₂ and highlight the role of metal-substrate interaction in engineering 2D materials with tailored structural phases.

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BibTeX RIS

BibTeX

@article{asikainen2026suppression,
  title = {{Suppression of stripe-ordered structural phases in monolayer IrTe2 by a gold substrate}},
  author = {Kati Asikainen and Frédéric Chassot and Baptiste Hildebrand and Aymen Mahmoudi and Joël Morf and Mahault Berset and Pascal Turban and Matti Alatalo and Assa Aravindh Sasikala Devi and Marko Huttula and KeYuan Ma and Fabian O. von Rohr and Jean-Christophe Le Breton and Thomas Jaouen and Claude Monney},
  journal = {Communications Physics},
  year = {2026},
  month = nov,
  doi = {10.1038/s42005-026-02917-9},
  url = {https://www.nature.com/articles/s42005-026-02917-9},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - Suppression of stripe-ordered structural phases in monolayer IrTe2 by a gold substrate
AU  - Kati Asikainen
AU  - Frédéric Chassot
AU  - Baptiste Hildebrand
AU  - Aymen Mahmoudi
AU  - Joël Morf
AU  - Mahault Berset
AU  - Pascal Turban
AU  - Matti Alatalo
AU  - Assa Aravindh Sasikala Devi
AU  - Marko Huttula
AU  - KeYuan Ma
AU  - Fabian O. von Rohr
AU  - Jean-Christophe Le Breton
AU  - Thomas Jaouen
AU  - Claude Monney
PY  - 2026
DA  - 2026/11/02
JO  - Communications Physics
DO  - 10.1038/s42005-026-02917-9
UR  - https://www.nature.com/articles/s42005-026-02917-9
AB  - Metal-assisted exfoliation of two-dimensional (2D) materials has emerged as an efficient route to isolating large-area monolayer crystals, yet the influence of the supporting metal substrate on their intrinsic properties remains poorly understood. Here, we demonstrate successful gold-assisted exfoliation of monolayer IrTe ₂ up to the millimeter scale. Angle-resolved photoemission spectroscopy (ARPES), combined with first-principles calculations, reveals that the low-energy electronic structure closely resembles that of a freestanding monolayer 1T-IrTe ₂ . We find that quasi-covalent hybridization together with substrate-induced strain leads to only modest modifications of the electronic bands. Although strain contributes to phase stability, it is essentially hybridization that drives the stabilization of the 1T-phase of the monolayer IrTe ₂ by suppressing stripe-ordered phase transitions. These results establish gold-assisted exfoliation as a robust route to prepare a large-area monolayer IrTe ₂ and highlight the role of metal-substrate interaction in engineering 2D materials with tailored structural phases.
SN  - 2399-3650
ER  -

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