{"paper":{"title":"Fermi-surface induced modulation in an optimally doped YBCO superconductor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Jonathan C. Lang, Robert J. McQueeney, Simon C. Moss, Sunil K. Sinha, Ulrich Welp, Xuerong Liu, Zahirul Islam","submitted_at":"2008-05-27T19:32:31Z","abstract_excerpt":"We have observed a Fermi-surface (FS) induced lattice modulation in a YBCO superconductor with a wavevector along CuO chains, {\\it i.e.} ${\\bf q}_1$=(0,$\\delta$,0). The value of $\\delta\\sim0.21$ is twice the Fermi wavevector ($2{\\bf k}_F$) along {\\bf b*} connecting nearly nested FS `ridges'. The ${\\bf q}_1$ modulation exists only within O-vacancy-ordered islands (characterized by ${\\bf q}_0$=$(\\frac14,0,0))$ and persists well above and below $T_c$. Our results are consistent with the presence of a FS-induced charge-density wave."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0805.4193","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"}