{"paper":{"title":"Evidence for nodeless superconducting gap in NaFe$_{1-x}$Co$_x$As from low-temperature thermal conductivity measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"A. F. Wang, B. Y. Pan, S. Y. Li, S. Y. Zhou, W. N. Dong, X. C. Hong, X. G. Luo, X. H. Chen, X. L. Li, X. Qiu, Z. Zhang","submitted_at":"2012-04-16T11:07:49Z","abstract_excerpt":"The thermal conductivity of optimally doped NaFe$_{0.972}$Co$_{0.028}$As ($T_c \\sim$ 20 K) and overdoped NaFe$_{0.925}$Co$_{0.075}$As ($T_c \\sim$ 11 K) single crystals were measured down to 50 mK. No residual linear term $\\kappa_0/T$ is found in zero magnetic field for both compounds, which is an evidence for nodeless superconducting gap. Applying field up to $H$ = 9 T ($\\approx H_{c2}/4$) does not noticeably increase $\\kappa_0/T$ in NaFe$_{1.972}$Co$_{0.028}$As, which is consistent with multiple isotropic gaps with similar magnitudes. The $\\kappa_0/T$ of overdoped NaFe$_{1.925}$Co$_{0.075}$As"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.3440","kind":"arxiv","version":2},"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"}