{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:VPPBQLVI5B7GRJN3JLJYLKOQ7B","short_pith_number":"pith:VPPBQLVI","canonical_record":{"source":{"id":"1206.2030","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-06-10T13:48:28Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"1399b831efb4087ffba282c2fb6d880536edb72a29f81f8e68cdda1470d0c72a","abstract_canon_sha256":"5f91a5c9110e0ca2a3142a7ccdbeefc550b1c62c4b6ee549912ba2a29d2a89ee"},"schema_version":"1.0"},"canonical_sha256":"abde182ea8e87e68a5bb4ad385a9d0f8699ab82e09c9b2f3135736e418fb6eee","source":{"kind":"arxiv","id":"1206.2030","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.2030","created_at":"2026-05-18T02:56:58Z"},{"alias_kind":"arxiv_version","alias_value":"1206.2030v3","created_at":"2026-05-18T02:56:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.2030","created_at":"2026-05-18T02:56:58Z"},{"alias_kind":"pith_short_12","alias_value":"VPPBQLVI5B7G","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VPPBQLVI5B7GRJN3","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VPPBQLVI","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:VPPBQLVI5B7GRJN3JLJYLKOQ7B","target":"record","payload":{"canonical_record":{"source":{"id":"1206.2030","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-06-10T13:48:28Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"1399b831efb4087ffba282c2fb6d880536edb72a29f81f8e68cdda1470d0c72a","abstract_canon_sha256":"5f91a5c9110e0ca2a3142a7ccdbeefc550b1c62c4b6ee549912ba2a29d2a89ee"},"schema_version":"1.0"},"canonical_sha256":"abde182ea8e87e68a5bb4ad385a9d0f8699ab82e09c9b2f3135736e418fb6eee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:56:58.587781Z","signature_b64":"3DRu2bwfxAEl5UN6KgfjzJWlhD0N5ahZCOcRwK6wnPBZ1iZrHS8S0FsVPDxpl2fshMLO+vPyLf2R1HGFX1ZeCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"abde182ea8e87e68a5bb4ad385a9d0f8699ab82e09c9b2f3135736e418fb6eee","last_reissued_at":"2026-05-18T02:56:58.587387Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:56:58.587387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.2030","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:56:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nriYH62Hz91Wma/NpJfYDfb0W5RYDCQrnV7769Jp0uXFXAP/v7N/jGmO/gc13w/5tvrLQpjGzK9mo4SamGc3Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T14:25:14.584828Z"},"content_sha256":"77b42b6f7f6310ad65934d5a202ffb0e287300b54ee483cd8548693bd0b825de","schema_version":"1.0","event_id":"sha256:77b42b6f7f6310ad65934d5a202ffb0e287300b54ee483cd8548693bd0b825de"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:VPPBQLVI5B7GRJN3JLJYLKOQ7B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Anomalous impurity effects in the iron-based superconductor KFe$_2$As$_2$","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, G. J. Ye, J. J. Ying, P. Cheng, S. Y. Li, S. Y. Zhou, X. C. Hong, X. G. Luo, X. H. Chen, Y. J. Yan, Z. J. Xiang","submitted_at":"2012-06-10T13:48:28Z","abstract_excerpt":"High-quality K(Fe$_{1-x}$Co$_x$)$_2$As$_2$ single crystals have been grown by using KAs flux method. Instead of increasing the superconducting transition temperature $T_{\\rm c}$ through electron doping, we find that Co impurities rapidly suppress $T_{\\rm c}$ down to zero at only $x \\approx$ 0.04. Such an effective suppression of $T_{\\rm c}$ by impurities is quite different from that observed in Ba$_{0.5}$K$_{0.5}$Fe$_2$As$_2$ with multiple nodeless superconducting gaps. Thermal conductivity measurements in zero field show that the residual linear term $\\kappa_0/T$ only change slightly with $3."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.2030","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:56:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QfaXWUUNHs2RBR/BH7J2uqaYFZzgErA1o+torz+XUB3sH0PUtXU4b8/YcnxCyYOZ4Kep8APnz+kLc/eIPbImAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T14:25:14.585587Z"},"content_sha256":"a41597e98403e2ac00e64b1427a0c6c60f22e179f6d01a87fb4953ce3153c998","schema_version":"1.0","event_id":"sha256:a41597e98403e2ac00e64b1427a0c6c60f22e179f6d01a87fb4953ce3153c998"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VPPBQLVI5B7GRJN3JLJYLKOQ7B/bundle.json","state_url":"https://pith.science/pith/VPPBQLVI5B7GRJN3JLJYLKOQ7B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VPPBQLVI5B7GRJN3JLJYLKOQ7B/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T14:25:14Z","links":{"resolver":"https://pith.science/pith/VPPBQLVI5B7GRJN3JLJYLKOQ7B","bundle":"https://pith.science/pith/VPPBQLVI5B7GRJN3JLJYLKOQ7B/bundle.json","state":"https://pith.science/pith/VPPBQLVI5B7GRJN3JLJYLKOQ7B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VPPBQLVI5B7GRJN3JLJYLKOQ7B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:VPPBQLVI5B7GRJN3JLJYLKOQ7B","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5f91a5c9110e0ca2a3142a7ccdbeefc550b1c62c4b6ee549912ba2a29d2a89ee","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-06-10T13:48:28Z","title_canon_sha256":"1399b831efb4087ffba282c2fb6d880536edb72a29f81f8e68cdda1470d0c72a"},"schema_version":"1.0","source":{"id":"1206.2030","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.2030","created_at":"2026-05-18T02:56:58Z"},{"alias_kind":"arxiv_version","alias_value":"1206.2030v3","created_at":"2026-05-18T02:56:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.2030","created_at":"2026-05-18T02:56:58Z"},{"alias_kind":"pith_short_12","alias_value":"VPPBQLVI5B7G","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VPPBQLVI5B7GRJN3","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VPPBQLVI","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:a41597e98403e2ac00e64b1427a0c6c60f22e179f6d01a87fb4953ce3153c998","target":"graph","created_at":"2026-05-18T02:56:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"High-quality K(Fe$_{1-x}$Co$_x$)$_2$As$_2$ single crystals have been grown by using KAs flux method. Instead of increasing the superconducting transition temperature $T_{\\rm c}$ through electron doping, we find that Co impurities rapidly suppress $T_{\\rm c}$ down to zero at only $x \\approx$ 0.04. Such an effective suppression of $T_{\\rm c}$ by impurities is quite different from that observed in Ba$_{0.5}$K$_{0.5}$Fe$_2$As$_2$ with multiple nodeless superconducting gaps. Thermal conductivity measurements in zero field show that the residual linear term $\\kappa_0/T$ only change slightly with $3.","authors_text":"A. F. Wang, G. J. Ye, J. J. Ying, P. Cheng, S. Y. Li, S. Y. Zhou, X. C. Hong, X. G. Luo, X. H. Chen, Y. J. Yan, Z. J. Xiang","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-06-10T13:48:28Z","title":"Anomalous impurity effects in the iron-based superconductor KFe$_2$As$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.2030","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:77b42b6f7f6310ad65934d5a202ffb0e287300b54ee483cd8548693bd0b825de","target":"record","created_at":"2026-05-18T02:56:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5f91a5c9110e0ca2a3142a7ccdbeefc550b1c62c4b6ee549912ba2a29d2a89ee","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-06-10T13:48:28Z","title_canon_sha256":"1399b831efb4087ffba282c2fb6d880536edb72a29f81f8e68cdda1470d0c72a"},"schema_version":"1.0","source":{"id":"1206.2030","kind":"arxiv","version":3}},"canonical_sha256":"abde182ea8e87e68a5bb4ad385a9d0f8699ab82e09c9b2f3135736e418fb6eee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"abde182ea8e87e68a5bb4ad385a9d0f8699ab82e09c9b2f3135736e418fb6eee","first_computed_at":"2026-05-18T02:56:58.587387Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:56:58.587387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3DRu2bwfxAEl5UN6KgfjzJWlhD0N5ahZCOcRwK6wnPBZ1iZrHS8S0FsVPDxpl2fshMLO+vPyLf2R1HGFX1ZeCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:56:58.587781Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.2030","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77b42b6f7f6310ad65934d5a202ffb0e287300b54ee483cd8548693bd0b825de","sha256:a41597e98403e2ac00e64b1427a0c6c60f22e179f6d01a87fb4953ce3153c998"],"state_sha256":"f697d2d74fb6e65a28267326760288a068ce5fb610cb41d21372b4263e1435a5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"leAE41jh0c5QtYDQ1pax5/EJaP/w50bUmW4vhFl+0Ssv+r+7x/S1DGgv/IAY7+Fh40qKy52sRF11mzgjfBwCBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T14:25:14.589259Z","bundle_sha256":"84839e21577a50f2c0c628d881b89c6c56c56a91c1bb236b859beeb21d446aaf"}}