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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2511.05648 |
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| _version_ | 1866911255428595712 |
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| author | Saika, B. K. Buchberger, S. Mo, S. Rajan, A. Halliday, D. Yao, Y. -C. Rhodes, L. C. Sarpi, B. Balasubramanian, T. Polley, C. Wahl, P. King, P. D. C. |
| author_facet | Saika, B. K. Buchberger, S. Mo, S. Rajan, A. Halliday, D. Yao, Y. -C. Rhodes, L. C. Sarpi, B. Balasubramanian, T. Polley, C. Wahl, P. King, P. D. C. |
| contents | The formation of flat electronic bands from long-wavelength superperiodic moiré potentials in van der Waals heterostructures underpins the creation and control of a host of highly-tuneable correlated and topological phases. The underlying moiré periodicity is, however, typically considered a fixed property of the heterostructure. Here, we show how the development of a charge-density wave (CDW) in one of the constituent materials can create an emergent moiré periodicity, realising a superperiodic potential in TiSe$_2$/graphite epitaxial heterostructures with an order-of-magnitude longer wavelength than that expected from the normal-state lattice mismatch. We demonstrate how this drives the formation of a remarkably strong band flattening, which can be readily deactivated by carrier doping across the CDW phase transition, opening new prospects for engineering moiré matter by exploiting the rich many-body states of the parent compounds of 2D heterostructures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_05648 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Flat electronic bands from cooperative moiré and charge order Saika, B. K. Buchberger, S. Mo, S. Rajan, A. Halliday, D. Yao, Y. -C. Rhodes, L. C. Sarpi, B. Balasubramanian, T. Polley, C. Wahl, P. King, P. D. C. Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science The formation of flat electronic bands from long-wavelength superperiodic moiré potentials in van der Waals heterostructures underpins the creation and control of a host of highly-tuneable correlated and topological phases. The underlying moiré periodicity is, however, typically considered a fixed property of the heterostructure. Here, we show how the development of a charge-density wave (CDW) in one of the constituent materials can create an emergent moiré periodicity, realising a superperiodic potential in TiSe$_2$/graphite epitaxial heterostructures with an order-of-magnitude longer wavelength than that expected from the normal-state lattice mismatch. We demonstrate how this drives the formation of a remarkably strong band flattening, which can be readily deactivated by carrier doping across the CDW phase transition, opening new prospects for engineering moiré matter by exploiting the rich many-body states of the parent compounds of 2D heterostructures. |
| title | Flat electronic bands from cooperative moiré and charge order |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2511.05648 |