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<p>We report on a study of the interacting phase diagram of 3.65°-twisted WSe<sub>2</sub> at moiré hole filling <i>ν</i> = 1, in which we find previously-overlooked types of magnetism. Specifically, in part of the phase diagram we obtain a magnetic order parameter which modulates in space with four different non-zero wave vectors, corresponding to the three <i>M</i>-points and one <i>K</i>-point of the moiré Brillouin zone. These multi-Q orders, which can be coplanar or non-coplanar, are continuous deformations of the 120° spin-valley anti-ferromagnet (AFM), where the unit cell has expanded by a factor of four. Interestingly, we find that the multi-Q states are stabilized for experimentally relevant values of interaction strength and displacement field, and are accompanied by a softening of the spin fluctuations near the <i>M</i>-points of the moiré Brillouin zone.</p>

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Multi-Q spin-valley order in twisted WSe2

  • 期刊论文

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  • 发表日期：

    2026年4月24日

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  • Arthur Bril,
  • Nai Chao Hu,
  • Nick Bultinck

摘要

We report on a study of the interacting phase diagram of 3.65°-twisted WSe2 at moiré hole filling ν = 1, in which we find previously-overlooked types of magnetism. Specifically, in part of the phase diagram we obtain a magnetic order parameter which modulates in space with four different non-zero wave vectors, corresponding to the three M-points and one K-point of the moiré Brillouin zone. These multi-Q orders, which can be coplanar or non-coplanar, are continuous deformations of the 120° spin-valley anti-ferromagnet (AFM), where the unit cell has expanded by a factor of four. Interestingly, we find that the multi-Q states are stabilized for experimentally relevant values of interaction strength and displacement field, and are accompanied by a softening of the spin fluctuations near the M-points of the moiré Brillouin zone.