{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:SVA6Q64MJHO3QGPHHKAV6UCGKD","short_pith_number":"pith:SVA6Q64M","canonical_record":{"source":{"id":"1310.6733","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-10-24T19:52:18Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"aeafd9d14a2dbd73edca80ca68be40c3545cde1d3e44a61cbbd66e1df7fd7d8b","abstract_canon_sha256":"7d9ff95d84ad7c2c1a3be28900c54fe6d19be86c6903cab96351cbb397502e48"},"schema_version":"1.0"},"canonical_sha256":"9541e87b8c49ddb819e73a815f504650e6202b5ddab64fe4200b08ad6b76a868","source":{"kind":"arxiv","id":"1310.6733","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.6733","created_at":"2026-05-18T00:48:21Z"},{"alias_kind":"arxiv_version","alias_value":"1310.6733v2","created_at":"2026-05-18T00:48:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.6733","created_at":"2026-05-18T00:48:21Z"},{"alias_kind":"pith_short_12","alias_value":"SVA6Q64MJHO3","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SVA6Q64MJHO3QGPH","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SVA6Q64M","created_at":"2026-05-18T12:27:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:SVA6Q64MJHO3QGPHHKAV6UCGKD","target":"record","payload":{"canonical_record":{"source":{"id":"1310.6733","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-10-24T19:52:18Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"aeafd9d14a2dbd73edca80ca68be40c3545cde1d3e44a61cbbd66e1df7fd7d8b","abstract_canon_sha256":"7d9ff95d84ad7c2c1a3be28900c54fe6d19be86c6903cab96351cbb397502e48"},"schema_version":"1.0"},"canonical_sha256":"9541e87b8c49ddb819e73a815f504650e6202b5ddab64fe4200b08ad6b76a868","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:48:21.062338Z","signature_b64":"xPEFpMzSzIvPFl6KkNqQ12muIbn7tqmEg5U+v78llKUxybJUf9sHXDhkjRJnG8U/ovlPI7HQ1KM1dVWgj2l9AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9541e87b8c49ddb819e73a815f504650e6202b5ddab64fe4200b08ad6b76a868","last_reissued_at":"2026-05-18T00:48:21.061862Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:48:21.061862Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.6733","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:48:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5Ss9FrBPfPpl8wtY+rCs37+w0SN2nwT6UpiByx7YMHbcCov+iWsRbxMVjoRUCbcE4hIlf52LwJtc66//sc1JAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:39:22.525256Z"},"content_sha256":"c6c11f36bba50fbd7a2663ffa1ce66c128f928e48600ad293463db2c7bd03ec5","schema_version":"1.0","event_id":"sha256:c6c11f36bba50fbd7a2663ffa1ce66c128f928e48600ad293463db2c7bd03ec5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:SVA6Q64MJHO3QGPHHKAV6UCGKD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Etching of Cr tips for scanning tunneling microscopy of cleavable oxides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Dennis Huang, Ilija Zeljkovic, Jennifer E. Hoffman, J. F. Mitchell, Stephen Liu","submitted_at":"2013-10-24T19:52:18Z","abstract_excerpt":"We report a detailed three-step roadmap for the fabrication and characterization of bulk Cr tips for spin-polarized scanning tunneling microscopy. Our strategy uniquely circumvents the need for ultra-high vacuum preparation of clean surfaces or films. First, we demonstrate the role of $ex$-$situ$ electrochemical etch parameters on Cr tip apex geometry, using scanning electron micrographs of over 70 etched tips. Second, we describe the suitability of the $in$-$situ$ cleaved surface of the layered antiferromagnet La$_{1.4}$Sr$_{1.6}$Mn$_2$O$_7$ to evaluate the spin characteristics of the Cr tip,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.6733","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:48:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NWoBTH9Kh0tT3amR5s3X+CwG4cqXY1cSZnlpwZp++kya+IIZ0BC4vyGNgT9u/gc5bmqvli6QFKazAmMSAUk7Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:39:22.525683Z"},"content_sha256":"430e9e241bb77d0c11accec1c34609f288d1f227bba8abb97a8f2d98aad0b2d4","schema_version":"1.0","event_id":"sha256:430e9e241bb77d0c11accec1c34609f288d1f227bba8abb97a8f2d98aad0b2d4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SVA6Q64MJHO3QGPHHKAV6UCGKD/bundle.json","state_url":"https://pith.science/pith/SVA6Q64MJHO3QGPHHKAV6UCGKD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SVA6Q64MJHO3QGPHHKAV6UCGKD/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":"2026-06-02T11:39:22Z","links":{"resolver":"https://pith.science/pith/SVA6Q64MJHO3QGPHHKAV6UCGKD","bundle":"https://pith.science/pith/SVA6Q64MJHO3QGPHHKAV6UCGKD/bundle.json","state":"https://pith.science/pith/SVA6Q64MJHO3QGPHHKAV6UCGKD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SVA6Q64MJHO3QGPHHKAV6UCGKD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SVA6Q64MJHO3QGPHHKAV6UCGKD","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":"7d9ff95d84ad7c2c1a3be28900c54fe6d19be86c6903cab96351cbb397502e48","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-10-24T19:52:18Z","title_canon_sha256":"aeafd9d14a2dbd73edca80ca68be40c3545cde1d3e44a61cbbd66e1df7fd7d8b"},"schema_version":"1.0","source":{"id":"1310.6733","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.6733","created_at":"2026-05-18T00:48:21Z"},{"alias_kind":"arxiv_version","alias_value":"1310.6733v2","created_at":"2026-05-18T00:48:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.6733","created_at":"2026-05-18T00:48:21Z"},{"alias_kind":"pith_short_12","alias_value":"SVA6Q64MJHO3","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SVA6Q64MJHO3QGPH","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SVA6Q64M","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:430e9e241bb77d0c11accec1c34609f288d1f227bba8abb97a8f2d98aad0b2d4","target":"graph","created_at":"2026-05-18T00:48:21Z","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":"We report a detailed three-step roadmap for the fabrication and characterization of bulk Cr tips for spin-polarized scanning tunneling microscopy. Our strategy uniquely circumvents the need for ultra-high vacuum preparation of clean surfaces or films. First, we demonstrate the role of $ex$-$situ$ electrochemical etch parameters on Cr tip apex geometry, using scanning electron micrographs of over 70 etched tips. Second, we describe the suitability of the $in$-$situ$ cleaved surface of the layered antiferromagnet La$_{1.4}$Sr$_{1.6}$Mn$_2$O$_7$ to evaluate the spin characteristics of the Cr tip,","authors_text":"Dennis Huang, Ilija Zeljkovic, Jennifer E. Hoffman, J. F. Mitchell, Stephen Liu","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-10-24T19:52:18Z","title":"Etching of Cr tips for scanning tunneling microscopy of cleavable oxides"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.6733","kind":"arxiv","version":2},"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:c6c11f36bba50fbd7a2663ffa1ce66c128f928e48600ad293463db2c7bd03ec5","target":"record","created_at":"2026-05-18T00:48:21Z","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":"7d9ff95d84ad7c2c1a3be28900c54fe6d19be86c6903cab96351cbb397502e48","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-10-24T19:52:18Z","title_canon_sha256":"aeafd9d14a2dbd73edca80ca68be40c3545cde1d3e44a61cbbd66e1df7fd7d8b"},"schema_version":"1.0","source":{"id":"1310.6733","kind":"arxiv","version":2}},"canonical_sha256":"9541e87b8c49ddb819e73a815f504650e6202b5ddab64fe4200b08ad6b76a868","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9541e87b8c49ddb819e73a815f504650e6202b5ddab64fe4200b08ad6b76a868","first_computed_at":"2026-05-18T00:48:21.061862Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:48:21.061862Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xPEFpMzSzIvPFl6KkNqQ12muIbn7tqmEg5U+v78llKUxybJUf9sHXDhkjRJnG8U/ovlPI7HQ1KM1dVWgj2l9AA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:48:21.062338Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.6733","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c6c11f36bba50fbd7a2663ffa1ce66c128f928e48600ad293463db2c7bd03ec5","sha256:430e9e241bb77d0c11accec1c34609f288d1f227bba8abb97a8f2d98aad0b2d4"],"state_sha256":"5e721c6d065c549b597ec9779e0d4dbbec82cdcb618f47c478ad72aa69343223"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XxwkyZTviEsaehxyIXONbiiSwf/P2+snXluLJp9B8kHkuybYJ9vJC7RCZjC1U/mGkHCjIUBaf0aSuBOlLyQgDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T11:39:22.529299Z","bundle_sha256":"ee517e313c2e070eb2cc85e93e1c262761d120234bdc3574016e00aab5131c21"}}