{"paper":{"title":"Spin Gap in Heavy Fermion UBe$_{13}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Dmitry G. Eshchenko, James L. Smith, Jess H. Brewer, Oleg E. Parfenov, Patrick W. Mengyan, Pinder Dosanjh, Vyacheslav G. Storchak, Zachary Fisk","submitted_at":"2013-09-25T06:03:11Z","abstract_excerpt":"Muon spin rotation ($\\mu^+$SR) experiments have been carried out in the heavy fermion compound UBe$_{13}$ in the temperature range from 0.025 K to 300 K and in magnetic fields up to 7 T, supported by resistivity and magnetization measurements. The $\\mu^+$SR spectra are characteristic of formation of a spin polaron which persists to the lowest temperature. A gap in the spin excitation spectrum of f-electrons opens up at about 180 K, consistent with anomalies discovered in resistivity, heat capacity, NMR and optical conductivity measurements of UBe$_{13}$."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.6407","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"}