Resonant interlayer coupling in NbSe$_2$-graphite epitaxial moir{é} superlattices
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| Autores principales: | , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866915840671088640 |
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| author | Mo, S. Kovalenka, K. Buchberger, S. Saika, B. K. Azhar, A. Rajan, A. Zivanovic, A. Yao, Y. -C. Belosludov, R. V. Watson, M. D. Bahramy, M. S. King, P. D. C. |
| author_facet | Mo, S. Kovalenka, K. Buchberger, S. Saika, B. K. Azhar, A. Rajan, A. Zivanovic, A. Yao, Y. -C. Belosludov, R. V. Watson, M. D. Bahramy, M. S. King, P. D. C. |
| contents | Moir{é} heterostructures, created by stacking two-dimensional (2D) materials together with a finite lattice mismatch or rotational twist, represent a new frontier of designer quantum materials. Typically, however, this requires the painstaking manual assembly of heterostructures formed from exfoliated materials. Here, we observe clear spectroscopic signatures of moir{é} lattice formation in epitaxial heterostructures of monolayer (ML) NbSe$_2$ grown on graphite substrates. Our angle-resolved photoemission measurements and theoretical calculations of the resulting electronic structure reveal moir{é} replicas of the graphite $π$ states forming pairs of interlocking Dirac cones. Interestingly, these intersect the NbSe$_2$ Fermi surface at the $\mathbf{k}$-space locations where NbSe$_2$'s charge-density wave (CDW) gap is maximal in the bulk. This provides a natural route to understand the lack of CDW enhancement for ML-NbSe$_2$/graphene as compared to a more than four-fold enhancement for NbSe$_2$ on insulating support substrates, and opens new prospects for using moir{é} engineering for controlling the collective states of 2D materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_00449 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Resonant interlayer coupling in NbSe$_2$-graphite epitaxial moir{é} superlattices Mo, S. Kovalenka, K. Buchberger, S. Saika, B. K. Azhar, A. Rajan, A. Zivanovic, A. Yao, Y. -C. Belosludov, R. V. Watson, M. D. Bahramy, M. S. King, P. D. C. Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity Moir{é} heterostructures, created by stacking two-dimensional (2D) materials together with a finite lattice mismatch or rotational twist, represent a new frontier of designer quantum materials. Typically, however, this requires the painstaking manual assembly of heterostructures formed from exfoliated materials. Here, we observe clear spectroscopic signatures of moir{é} lattice formation in epitaxial heterostructures of monolayer (ML) NbSe$_2$ grown on graphite substrates. Our angle-resolved photoemission measurements and theoretical calculations of the resulting electronic structure reveal moir{é} replicas of the graphite $π$ states forming pairs of interlocking Dirac cones. Interestingly, these intersect the NbSe$_2$ Fermi surface at the $\mathbf{k}$-space locations where NbSe$_2$'s charge-density wave (CDW) gap is maximal in the bulk. This provides a natural route to understand the lack of CDW enhancement for ML-NbSe$_2$/graphene as compared to a more than four-fold enhancement for NbSe$_2$ on insulating support substrates, and opens new prospects for using moir{é} engineering for controlling the collective states of 2D materials. |
| title | Resonant interlayer coupling in NbSe$_2$-graphite epitaxial moir{é} superlattices |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2506.00449 |