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arXiv · 2406.03525

Theory of Correlated Insulators and Superconductor at $\nu=1$ in Twisted WSe$_2$

Sunghoon Kim·Juan Felipe Mendez-Valderrama·Xuepeng Wang·Debanjan Chowdhury
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Abstract

The observation of a superconducting phase, an intertwined insulating phase, and a continuous transition between the two at a commensurate filling of $\nu=1$ in bilayers of twisted WSe$_2$ at $\theta=3.65^0$ raises a number of intriguing questions about the origin of this phenomenology. Here we report the possibility of a displacement-field induced continuous transition between a superconductor and a quantum spin-liquid Mott insulator at $\nu=1$, starting with a simplified three-orbital model of twisted WSe$_2$, including on-site, nearest-neighbor density-density interactions, and a chiral-exchange interaction, respectively. By employing parton mean-field theory, we discuss the nature of these correlated insulators, their expected evolution with the displacement-field, and their phenomenological properties.

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Sunghoon Kim, Juan Felipe Mendez-Valderrama, Xuepeng Wang, Debanjan Chowdhury. 2024-06-05. Theory of Correlated Insulators and Superconductor at $\nu=1$ in Twisted WSe$_2$. https://doi.org/10.1038/s41467-025-56816-8

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