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We investigated superfluid hydrodynamics and revealed a stripe compression mode, thus demonstrating that the system possesses a compressible crystalline structure. Through the frequency softening of this mode, we located the supersolid transition point. Our results establish spin-orbit\u2013coupled supersolids as ideal systems to investigate supersolidity and its rich dynamics.<\/jats:p>","DOI":"10.1126\/science.adv1209","type":"journal-article","created":{"date-parts":[[2026,1,29]],"date-time":"2026-01-29T19:01:14Z","timestamp":1769713274000},"page":"480-484","update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":10,"title":["Probing supersolidity through excitations in a spin-orbit\u2013coupled Bose-Einstein condensate"],"prefix":"10.1126","volume":"391","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5599-0158","authenticated-orcid":true,"given":"C. 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