{"paper":{"title":"Comment on: ``Using Ni Substitution and $^{17}$O NMR to Probe the Susceptibility $\\chi'(q)$ in Cuprates''","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Charles P. Slichter (University of Illinois at Urbana-Champaign), Dirk. K. Morr, Joerg Schmalian, Raivo Stern","submitted_at":"1997-10-23T20:25:06Z","abstract_excerpt":"In a recent letter (PRL 79, 2117 (1997)), Bobroff et al. presented novel $^{17}$O NMR measurements for YBa_2(Cu_{1-x}Ni_x)_3O_{6+y} which offer a new probe of the momentum dependence of the static spin susceptibility $\\chi'(q)$. They analyzed the $^{17}$O line width by assuming a Gaussian form for $\\chi'$, and came to the conclusion that the correlation length $\\xi$ is independent of temperature $T$. Furthermore, they claim that a Lorentzian form of $\\chi'$ yields the same result. We will demonstrate that the Lorentzian and Gaussian form of $\\chi'$ actually yield qualitatively different result"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9710257","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"}