{"paper":{"title":"Multiple Andreev reflections spectroscopy of two-gap 1111- and 11 Fe-based superconductors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A.N. Vasiliev, A.S. Usol'tsev, A.V. Sadakov, E.P. Khlybov, M.G. Mikheev, M.V. Sudakova, O.S. Volkova, S.A. Kuzmichev, S.N. Tchesnokov, T.E. Kuzmicheva, Th. Wolf, V.M. Pudalov, Ya.G. Ponomarev","submitted_at":"2013-02-21T16:11:38Z","abstract_excerpt":"Using the \"break-junction\" technique we prepared and studied superconductor - constriction - superconductor nanocontacts in polycrystalline samples of Fe-based superconductors CeO$_{0.88}$F$_{0.12}$FeAs (Ce-1111; $T_C^{\\rm bulk} = 41 \\pm 1 K$), LaO$_{0.9}$F$_{0.1}$FeAs (La-1111; $T_C^{\\rm bulk} = 28 \\pm 1 K$), and FeSe ($T_C^{\\rm bulk} = 12 \\pm 1 K$). We detected two subharmonic gap structures related with multiple Andreev reflections, indicating the presence of two superconducting gaps with the BCS-ratios $2\\Delta_L/k_BT_C = 4.2 \\div 5.9$ and $2\\Delta_S/k_BT_C\\sim 1 \\ll 3.52$, respectively. T"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.5320","kind":"arxiv","version":3},"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"}