{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:WIKZ7PK57CD7EUHAND3STHUHXH","short_pith_number":"pith:WIKZ7PK5","canonical_record":{"source":{"id":"1901.06536","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-19T15:00:37Z","cross_cats_sorted":[],"title_canon_sha256":"9da5c0c8971b9d64ddcf2da300c24a40a9fdd9ac6d463f8e99de8b8de4c89afc","abstract_canon_sha256":"21f9fde5d16a4838ef0bff1aecd490f763db65426751d109cb8bf7d4aaf90688"},"schema_version":"1.0"},"canonical_sha256":"b2159fbd5df887f250e068f7299e87b9fe0ae37139f00a6145d137a10c8e37a2","source":{"kind":"arxiv","id":"1901.06536","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.06536","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1901.06536v1","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.06536","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"WIKZ7PK57CD7","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"WIKZ7PK57CD7EUHA","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"WIKZ7PK5","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:WIKZ7PK57CD7EUHAND3STHUHXH","target":"record","payload":{"canonical_record":{"source":{"id":"1901.06536","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-19T15:00:37Z","cross_cats_sorted":[],"title_canon_sha256":"9da5c0c8971b9d64ddcf2da300c24a40a9fdd9ac6d463f8e99de8b8de4c89afc","abstract_canon_sha256":"21f9fde5d16a4838ef0bff1aecd490f763db65426751d109cb8bf7d4aaf90688"},"schema_version":"1.0"},"canonical_sha256":"b2159fbd5df887f250e068f7299e87b9fe0ae37139f00a6145d137a10c8e37a2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:21.789428Z","signature_b64":"HD9mW+Z5uQqIdNXlGE9Eqr7SC4SYZX+wxMrnBaOcNmzlztu1yeJScPPFq2wtVprNZTwY0LE/35LgI5n+EAtQCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b2159fbd5df887f250e068f7299e87b9fe0ae37139f00a6145d137a10c8e37a2","last_reissued_at":"2026-05-17T23:50:21.788735Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:21.788735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.06536","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aBvQ4cSmigZ/LljfQ3mRRByELgiBBlmQpI5DDSk2NEnHqpQyopVd2sOPDCzyZ0eEJNZKuRZsa5tz+eU3FSZaBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:23:31.454057Z"},"content_sha256":"a3c2daecee66d59c43bd400464b3897db5da8cd54c998e68cd7c4a5b45f2714e","schema_version":"1.0","event_id":"sha256:a3c2daecee66d59c43bd400464b3897db5da8cd54c998e68cd7c4a5b45f2714e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:WIKZ7PK57CD7EUHAND3STHUHXH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Giant magneto-optical Kerr enhancement from films on SiC due to the optical properties of the substrate","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Mukherjee, C. R. Eddy Jr, C. T. Ellis, D. Kurt Gaskill, E. Oliverio, E. R. Glaser, G. Wang, H. Zeng, J. Cerne, J. G. Tischler, J. L. Tedesco, M. M. Arik, P. Fowler, P. Taheri, R. L. Myers-Ward, Y. Liu","submitted_at":"2019-01-19T15:00:37Z","abstract_excerpt":"We report a giant enhancement of the mid-infrared (MIR) magneto-optical complex Kerr angle (polarization change of reflected light) in a variety of materials grown on SiC. In epitaxially-grown multilayer graphene, the Kerr angle is enhanced by a factor of 68, which is in good agreement with Kerr signal modeling. Strong Kerr enhancement is also observed in Fe films grown on SiC and Al-doped bulk SiC. Our experiments and modelling indicate that the enhancement occurs at the high-energy edge of the SiC reststrahlen band where the real component of the complex refractive index n passes through uni"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.06536","kind":"arxiv","version":1},"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":"2026-05-17T23:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MZkXHlXDLT8qv0DKWcw1ysmECzDXTy4EOnrX8p0j7a+VbupUO7TQ5Tno3Tbt5BNTFtQLtxxGKuPqW5Nr7UipCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:23:31.454601Z"},"content_sha256":"7ccba404912874719478e29a7b55193e06d680266c3a6a2b70d0d4a964fe619f","schema_version":"1.0","event_id":"sha256:7ccba404912874719478e29a7b55193e06d680266c3a6a2b70d0d4a964fe619f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WIKZ7PK57CD7EUHAND3STHUHXH/bundle.json","state_url":"https://pith.science/pith/WIKZ7PK57CD7EUHAND3STHUHXH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WIKZ7PK57CD7EUHAND3STHUHXH/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":"2026-05-25T13:23:31Z","links":{"resolver":"https://pith.science/pith/WIKZ7PK57CD7EUHAND3STHUHXH","bundle":"https://pith.science/pith/WIKZ7PK57CD7EUHAND3STHUHXH/bundle.json","state":"https://pith.science/pith/WIKZ7PK57CD7EUHAND3STHUHXH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WIKZ7PK57CD7EUHAND3STHUHXH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:WIKZ7PK57CD7EUHAND3STHUHXH","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":"21f9fde5d16a4838ef0bff1aecd490f763db65426751d109cb8bf7d4aaf90688","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-19T15:00:37Z","title_canon_sha256":"9da5c0c8971b9d64ddcf2da300c24a40a9fdd9ac6d463f8e99de8b8de4c89afc"},"schema_version":"1.0","source":{"id":"1901.06536","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.06536","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1901.06536v1","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.06536","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"WIKZ7PK57CD7","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"WIKZ7PK57CD7EUHA","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"WIKZ7PK5","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:7ccba404912874719478e29a7b55193e06d680266c3a6a2b70d0d4a964fe619f","target":"graph","created_at":"2026-05-17T23:50:21Z","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 giant enhancement of the mid-infrared (MIR) magneto-optical complex Kerr angle (polarization change of reflected light) in a variety of materials grown on SiC. In epitaxially-grown multilayer graphene, the Kerr angle is enhanced by a factor of 68, which is in good agreement with Kerr signal modeling. Strong Kerr enhancement is also observed in Fe films grown on SiC and Al-doped bulk SiC. Our experiments and modelling indicate that the enhancement occurs at the high-energy edge of the SiC reststrahlen band where the real component of the complex refractive index n passes through uni","authors_text":"A. Mukherjee, C. R. Eddy Jr, C. T. Ellis, D. Kurt Gaskill, E. Oliverio, E. R. Glaser, G. Wang, H. Zeng, J. Cerne, J. G. Tischler, J. L. Tedesco, M. M. Arik, P. Fowler, P. Taheri, R. L. Myers-Ward, Y. Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-19T15:00:37Z","title":"Giant magneto-optical Kerr enhancement from films on SiC due to the optical properties of the substrate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.06536","kind":"arxiv","version":1},"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:a3c2daecee66d59c43bd400464b3897db5da8cd54c998e68cd7c4a5b45f2714e","target":"record","created_at":"2026-05-17T23:50:21Z","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":"21f9fde5d16a4838ef0bff1aecd490f763db65426751d109cb8bf7d4aaf90688","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-19T15:00:37Z","title_canon_sha256":"9da5c0c8971b9d64ddcf2da300c24a40a9fdd9ac6d463f8e99de8b8de4c89afc"},"schema_version":"1.0","source":{"id":"1901.06536","kind":"arxiv","version":1}},"canonical_sha256":"b2159fbd5df887f250e068f7299e87b9fe0ae37139f00a6145d137a10c8e37a2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b2159fbd5df887f250e068f7299e87b9fe0ae37139f00a6145d137a10c8e37a2","first_computed_at":"2026-05-17T23:50:21.788735Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:21.788735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HD9mW+Z5uQqIdNXlGE9Eqr7SC4SYZX+wxMrnBaOcNmzlztu1yeJScPPFq2wtVprNZTwY0LE/35LgI5n+EAtQCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:21.789428Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.06536","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a3c2daecee66d59c43bd400464b3897db5da8cd54c998e68cd7c4a5b45f2714e","sha256:7ccba404912874719478e29a7b55193e06d680266c3a6a2b70d0d4a964fe619f"],"state_sha256":"0baab9144949f67b97a28c849dd6c5b5e119002791ec71c2624374319d8ecb30"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZV9m4ByP+35tHQKU9k0FU2iE9LVdIWJY+U07olmn6JamH6KS55v5rBDSeWkyMCvrZHpUXQMoofTwd7mLXxzHAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:23:31.457424Z","bundle_sha256":"aa5e32ced126a23e0b98a666ca0bbec210bedd60287f66ccacd00b77b99e804e"}}