Taking snapshots of spin–valley modes in a moiré superlattice
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Subjects Magnetic properties and materialsQuantum fluids and solids An ultrafast imaging technique captured the propagation of charge-decoupled excitations in twisted bilayer WSe2. Two spin–valley modes with distinct propagation behaviours were revealed, consistent with the phase and amplitude modes of a spin–valley superfluid. Access through your institution Buy or subscribe This is a preview of subscription content, access via your institution Access options Access through your institution Access Nature and 54 other Nature Portfolio journals Get Nature+, our best-value online-access subscription $32.99 / 30 days cancel any time Learn more Subscribe to this journal Receive 12 print issues and online access $259.00 per year only $21.58 per issue Learn more Buy this articlePurchase on SpringerLinkInstant access to the full article PDF.USD 39.95Prices may be subject to local taxes which are calculated during checkout Fig. 1: Space-and-time-resolved imaging of charge-neutral collective modes.The alternative text for this image may have been generated using AI. ReferencesBi, Z. & Fu, L. Excitonic density wave and spin–valley superfluid in bilayer transition metal dichalcogenide. Nat. Commun. 12, 642 (2021). This theoretical work proposes the interpretation of the intervalley coherent state as a spin–valley superfluid in twisted WSe2.Article ADS Google Scholar Mak, K. F. & Shan, J. Semiconductor moiré materials. Nat. Nanotechnol. 17, 686–695 (2022). A review paper about moiré superlattices and exciton sensing.Article ADS Google Scholar Xia, Y. et al. Superconductivity in twisted bilayer WSe2. Nature 637, 833–838 (2025). This paper reports on the observation of superconductivity in twisted WSe2.Article ADS Google Scholar Guo, Y. et al. Superconductivity in 5.0° twisted bilayer WSe2. Nature 637, 839–845 (2025). This paper reports on the observation of superconductivity in twisted WSe2.Article ADS Google Scholar Bernevig, B. A. et al. Fractional quantization in insulators from Hall to Chern. Nat. Phys. 21, 1702–1713 (2025). A review paper about fractional Chern and fractional topological insulators and their experimental realizations in moiré materials.Article Google Scholar Download referencesAdditional informationPublisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.This is a summary of: Xiong, R. et al. Observation of propagating collective spin–valley modes in twisted WSe2. Nat. Phys. https://doi.org/10.1038/s41567-026-03280-w (2026).Rights and permissionsReprints and permissionsAbout this articleCite this article Taking snapshots of spin–valley modes in a moiré superlattice. Nat. Phys. (2026). https://doi.org/10.1038/s41567-026-03295-3Download citationPublished: 14 May 2026Version of record: 14 May 2026DOI: https://doi.org/10.1038/s41567-026-03295-3Share this articleAnyone you share the following link with will be able to read this content:Get shareable linkSorry, a shareable link is not currently available for this article.Copy shareable link to clipboard Provided by the Springer Nature SharedIt content-sharing initiative Observation of propagating collective spin–valley modes in twisted WSe2 Richen XiongYi GuoChenhao Jin Nature Physics Article 07 May 2026