{"paper":{"title":"Two-gap superconductivity in Ba_1-xK_xFe_2As_2: A complementary study of the magnetic penetration depth by \\muSR and ARPES","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. Amato, B. B\\\"uchner, Ch. Niedermayer, C.T. Lin, D.S. Inosov, D.V. Evtushinsky, G.L. Sun, H.-H. Klauss, H. Luetkens, J.T. Park, R. Khasanov, V. Hinkov","submitted_at":"2009-01-15T18:43:49Z","abstract_excerpt":"We investigate the magnetic penetration depth \\lambda in superconducting Ba_1-xK_xFe_2As_2 (T_c\\simeq32K) with muon-spin rotation (\\muSR) and angle-resolved photoemission (ARPES). Using \\muSR, we find the penetration-depth anisotropy \\gamma_\\lambda=\\lambda_c/\\lambda_{ab} and the second-critical-field anisotropy \\gamma_{H_c2} to show an opposite T-evolution below T_c. This dichotomy resembles the situation in the two-gap superconductor MgB_2. A two-gap scenario is also suggested by an inflection point in the in-plane penetration depth \\lambda_ab around 7K. The complementarity of \\muSR and ARPES"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.2329","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"}