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arXiv · 2103.09874

Floquet engineering of lattice structure and dimensionality in twisted moir\'e heterobilayers

Rong-Chun Ge·Michael Kolodrubetz
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Abstract

We present an experimental proposal to tune the effective lattice structure in twisted transition metal dichalcogenide (TMD) heterobilayers with time-periodic Floquet drive. We show that elliptically polarized light with sub-terahertz frequencies $\hbar\omega\sim 1$ meV and moderate electric fields $E\sim0.2$~MV/cm allows tuning between the native triangular lattice and a square lattice, while linearly polarized light enables dimensional reduction to a quasi-one-dimensional geometry. Without drive, these twisted TMDs simulate the single band Fermi-Hubbard model; we show that this approximation still holds in the presence of drive. This control opens the door to explore a rich variety of correlated phases of matter, such as spin liquids and d-wave superconductivity.

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Rong-Chun Ge, Michael Kolodrubetz. 2021-03-17. Floquet engineering of lattice structure and dimensionality in twisted moir\'e heterobilayers. https://arxiv.org/abs/2103.09874

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