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Drechsler","submitted_at":"2009-08-14T17:24:51Z","abstract_excerpt":"We report resistivity and upper critical field B_c2(T) data for disordered (As deficient) LaO_0.9F_0.1FeAs_1-delta in a wide temperature and high field range up to 60 T. These samples exhibit a slightly enhanced superconducting transition at T_c = 28.5 K and a significantly enlarged slope dB_c2/dT = -5.4 T/K near T_c which contrasts with a flattening of B_c2(T) starting near 23 K above 30 T. The latter evidences Pauli limiting behaviour (PLB) with B_c2(0) approximately 63 T. We compare our results with B_c2(T)-data from the literature for clean and disordered samples. Whereas clean samples sho"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0908.2101","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-08-14T17:24:51Z","cross_cats_sorted":["cond-mat.dis-nn"],"title_canon_sha256":"d6b78f30f1002ed58153d582e63e6f1b73fb24ff4ad30d03ec987a246fb4b6e8","abstract_canon_sha256":"676f64f9ca2fab6bb025cdd74cde0b320a537c0e9c7ec46d43153737cbdfacc0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:34.137054Z","signature_b64":"J539lnFXykqlOZ0MJm0cfc77huCP33f6gQWfNH3eUEQ49CFzM+Oy7jCDLk88D78XYCMpivhcyXg3dYFD2QkxCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"106a12cc267074913c07533d558933efe6441cdb3b90529cef5f8c7d63f6c18a","last_reissued_at":"2026-05-18T02:12:34.136426Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:34.136426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evidence for Pauli-limiting behaviour at high fields and enhanced upper critical fields near T_c in several disordered FeAs based Superconductors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.dis-nn"],"primary_cat":"cond-mat.supr-con","authors_text":"B. 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