{"paper":{"title":"Acoustic damping in Li$_2$O-2B$_2$O$_3$ glass observed by inelastic x-ray and optical Brillouin scattering","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.dis-nn","authors_text":"B. Ruffl\\'e, E. Courtens, G. Guimbreti\\`ere, G. Monaco, R. Vacher","submitted_at":"2005-10-27T18:07:16Z","abstract_excerpt":"The dynamic structure factor of lithium-diborate glass has been measured at several values of the momentum transfer $Q$ using high resolution inelastic x-ray scattering. Much attention has been devoted to the low $Q$-range, below the observed Ioffe-Regel crossover \\qco{}$\\simeq$ 2.1 nm$^{-1}$. We find that below \\qco{}, the linewidth of longitudinal acoustic waves increases with a high power of either $Q$, or of the frequency $\\Omega$, up to the crossover frequency \\OMco{} $\\simeq$ 9 meV that nearly coincides with the center of the boson peak. This new finding strongly supports the view that r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0510714","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}