Suppression of stripe-ordered structural phases in monolayer IrTe$_2$ by a gold substrate
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908694940221440 |
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| author | Asikainen, Kati Chassot, Frédéric Hildebrand, Baptiste Mahmoudi, Aymen Morf, Joel Berset, Mahault Turban, Pascal Alatalo, Matti Aravindh, S. Assa Huttula, Marko Ma, KeYuan von Rohr, Fabian O. Breton, Jean-Christophe Le Jaouen, Thomas Monney, Claude |
| author_facet | Asikainen, Kati Chassot, Frédéric Hildebrand, Baptiste Mahmoudi, Aymen Morf, Joel Berset, Mahault Turban, Pascal Alatalo, Matti Aravindh, S. Assa Huttula, Marko Ma, KeYuan von Rohr, Fabian O. Breton, Jean-Christophe Le Jaouen, Thomas Monney, Claude |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_05616 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Suppression of stripe-ordered structural phases in monolayer IrTe$_2$ by a gold substrate Asikainen, Kati Chassot, Frédéric Hildebrand, Baptiste Mahmoudi, Aymen Morf, Joel Berset, Mahault Turban, Pascal Alatalo, Matti Aravindh, S. Assa Huttula, Marko Ma, KeYuan von Rohr, Fabian O. Breton, Jean-Christophe Le Jaouen, Thomas Monney, Claude Materials Science 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. |
| title | Suppression of stripe-ordered structural phases in monolayer IrTe$_2$ by a gold substrate |
| topic | Materials Science |
| url | https://arxiv.org/abs/2512.05616 |