{"id":956,"date":"2026-07-17T16:08:24","date_gmt":"2026-07-17T10:38:24","guid":{"rendered":"https:\/\/physics.iisc.ac.in\/~aksy\/?p=956"},"modified":"2026-07-17T18:19:22","modified_gmt":"2026-07-17T12:49:22","slug":"signatures-of-moire-intralayer-biexcitons-and-exciton-phason-coupling-in-wse%e2%82%82-ws%e2%82%82","status":"publish","type":"post","link":"https:\/\/physics.iisc.ac.in\/~aksy\/2026\/07\/signatures-of-moire-intralayer-biexcitons-and-exciton-phason-coupling-in-wse%e2%82%82-ws%e2%82%82\/","title":{"rendered":"Signatures of moir\u00e9 intralayer biexcitons and exciton-phason coupling in WSe\u2082\/WS\u2082"},"content":{"rendered":"\n<p>Ranju Dalal et al., &#8220;Signatures of moire intralayer biexcitons and exciton-phason coupling in WSe2\/WS2,&#8221; arXiv:2601.03045 (2026).<\/p>\n\n\n\n<p>Summary: Exploring how light, electrons, and crystal lattices interact is key to understanding new phases in condensed-matter physics. Moir\u00e9 superlattices, created by stacking and twisting atomic layers (analogous to rotating two wire grids), offers a way to modify these interactions. By shining lasers in a specialized way, we uncover long-lived moir\u00e9 intralayer excitons. We further reveal long-lasting moir\u00e9 intralayer intervalley biexcitons (four-particle state) trapped within the twisted pattern. Remarkably, our measurements capture signatures of excitons \u201cdancing\u201d with phasons, which are very low energy lattice vibrations in superlattices. This &#8220;dance&#8221; results in twist-angle-dependent gigahertz oscillations in exciton dynamics. Our experimental approach turns twisted materials into a tuneable platform for studying diverse low-energy collective modes and developing the next generation of advanced quantum technologies.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ranju Dalal et al., &#8220;Signatures of moire intralayer biexcitons and exciton-phason coupling in WSe2\/WS2,&#8221; arXiv:2601.03045 (2026). Summary: Exploring how light, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":975,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-956","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-new-papers"],"_links":{"self":[{"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/posts\/956"}],"collection":[{"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/comments?post=956"}],"version-history":[{"count":2,"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/posts\/956\/revisions"}],"predecessor-version":[{"id":971,"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/posts\/956\/revisions\/971"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/media\/975"}],"wp:attachment":[{"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/media?parent=956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/categories?post=956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/physics.iisc.ac.in\/~aksy\/wp-json\/wp\/v2\/tags?post=956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}