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<p>The observation of a superconducting phase, an intertwined insulating phase, and a continuous transition between the two at a commensurate filling of <i>ν</i>&#xa0;=&#xa0;1 in bilayers of twisted WSe<sub>2</sub> at <i>θ</i>&#xa0;=&#xa0;3.65<sup>0</sup> 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 <i>ν</i>&#xa0;=&#xa0;1, starting with a simplified three-orbital model of twisted WSe<sub>2</sub>, 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.</p>

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Theory of correlated insulators and superconductor at ν = 1 in twisted WSe2

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月17日

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  • Sunghoon Kim,
  • Juan Felipe Mendez-Valderrama,
  • Xuepeng Wang,
  • Debanjan Chowdhury

摘要

The observation of a superconducting phase, an intertwined insulating phase, and a continuous transition between the two at a commensurate filling of ν = 1 in bilayers of twisted WSe2 at θ = 3.650 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 ν = 1, starting with a simplified three-orbital model of twisted WSe2, 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.