Tuning competing electronic phases in monolayer VSe$_2$ via interface hybridization
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866908865614839808 |
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| author | Pushkarna, Ishita Pásztor, Árpád Lupi, Greta Fumega, Adolfo O. Renner, Christoph |
| author_facet | Pushkarna, Ishita Pásztor, Árpád Lupi, Greta Fumega, Adolfo O. Renner, Christoph |
| contents | Competing electronic phases in two-dimensional transition metal dichalcogenides constitute a fertile platform for uncovering emergent ground states and elucidating the control parameters that govern the correlated electron phases. Among these materials, vanadium diselenide is particularly compelling: while the bulk hosts a well-established charge density wave (CDW), monolayers exhibit markedly different electronic behavior. Here, we identify three distinct electronic regimes in mechanically exfoliated VSe$_2$ flakes on Au(111) substrates, where interfacial hybridization, charge transfer, and strain act as primary tuning parameters of electronic order. Monolayers strongly coupled to gold show complete suppression of the CDW, accompanied by the emergence of moiré modulations. In contrast, bilayers preserve the in-plane $4a \times 4a$ CDW characteristic of the bulk limit. Strained, electronically decoupled monolayers formed in suspended membrane and bubble regions stabilize a $\sqrt{3}a\times\sqrt{7}a$ CDW phase, underscoring the reversible role of substrate interaction and hybridization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_03914 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Tuning competing electronic phases in monolayer VSe$_2$ via interface hybridization Pushkarna, Ishita Pásztor, Árpád Lupi, Greta Fumega, Adolfo O. Renner, Christoph Other Condensed Matter Competing electronic phases in two-dimensional transition metal dichalcogenides constitute a fertile platform for uncovering emergent ground states and elucidating the control parameters that govern the correlated electron phases. Among these materials, vanadium diselenide is particularly compelling: while the bulk hosts a well-established charge density wave (CDW), monolayers exhibit markedly different electronic behavior. Here, we identify three distinct electronic regimes in mechanically exfoliated VSe$_2$ flakes on Au(111) substrates, where interfacial hybridization, charge transfer, and strain act as primary tuning parameters of electronic order. Monolayers strongly coupled to gold show complete suppression of the CDW, accompanied by the emergence of moiré modulations. In contrast, bilayers preserve the in-plane $4a \times 4a$ CDW characteristic of the bulk limit. Strained, electronically decoupled monolayers formed in suspended membrane and bubble regions stabilize a $\sqrt{3}a\times\sqrt{7}a$ CDW phase, underscoring the reversible role of substrate interaction and hybridization. |
| title | Tuning competing electronic phases in monolayer VSe$_2$ via interface hybridization |
| topic | Other Condensed Matter |
| url | https://arxiv.org/abs/2603.03914 |