{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:LIV4LYZ4QKTLDK6YCVRYJUBZSW","short_pith_number":"pith:LIV4LYZ4","canonical_record":{"source":{"id":"1506.05619","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-06-18T10:47:13Z","cross_cats_sorted":[],"title_canon_sha256":"428a27fa44682bbf127d48099e7e38891e333d6342bb1a5c9c17af1bc84c1548","abstract_canon_sha256":"06f592628a63d8ae10237ec7a21d540f72c6578ba6e11da77a29730fba165cad"},"schema_version":"1.0"},"canonical_sha256":"5a2bc5e33c82a6b1abd8156384d0399585b3c5cedb8fb652cfdee4ae596e0566","source":{"kind":"arxiv","id":"1506.05619","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.05619","created_at":"2026-05-18T01:44:10Z"},{"alias_kind":"arxiv_version","alias_value":"1506.05619v1","created_at":"2026-05-18T01:44:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.05619","created_at":"2026-05-18T01:44:10Z"},{"alias_kind":"pith_short_12","alias_value":"LIV4LYZ4QKTL","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LIV4LYZ4QKTLDK6Y","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LIV4LYZ4","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:LIV4LYZ4QKTLDK6YCVRYJUBZSW","target":"record","payload":{"canonical_record":{"source":{"id":"1506.05619","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-06-18T10:47:13Z","cross_cats_sorted":[],"title_canon_sha256":"428a27fa44682bbf127d48099e7e38891e333d6342bb1a5c9c17af1bc84c1548","abstract_canon_sha256":"06f592628a63d8ae10237ec7a21d540f72c6578ba6e11da77a29730fba165cad"},"schema_version":"1.0"},"canonical_sha256":"5a2bc5e33c82a6b1abd8156384d0399585b3c5cedb8fb652cfdee4ae596e0566","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:10.179503Z","signature_b64":"WoXy1HaXXdp8LNQI+n9QCi3boCxx9VcW0BmBgTLLsdcnWAoajhDA1UF4Fd6rBzxEkiYwjbJwjAfyvkmjevhcDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a2bc5e33c82a6b1abd8156384d0399585b3c5cedb8fb652cfdee4ae596e0566","last_reissued_at":"2026-05-18T01:44:10.178857Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:10.178857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.05619","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":"2026-05-18T01:44:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CpNtOuYtw9XHxatqZs2fotrXO9L59OFbSA2WBZNyE7K2rIq0o/BC25xCztdzM7xe6PA/SadPwu1ndi/nqHZVAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T23:29:45.282852Z"},"content_sha256":"45746ccd65df87ae1cb50852466b90978e7c1aafa32e7c769a6ab4c6c458fa0e","schema_version":"1.0","event_id":"sha256:45746ccd65df87ae1cb50852466b90978e7c1aafa32e7c769a6ab4c6c458fa0e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:LIV4LYZ4QKTLDK6YCVRYJUBZSW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photoluminescence and Raman investigation of stability of InSe and GaSe thin films","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A. I. Dmitriev, A. I. Tartakovskii, D. N. Borisenko, E. A. Chekhovich, E. Margapoti, G. V. Lashkarev, J. J. Finley, J. Klein, N. N. Kolesnikov, O. Ceylan, O. Del Pozo-Zamudio, R. C. Schofield, S. Schwarz","submitted_at":"2015-06-18T10:47:13Z","abstract_excerpt":"Layered III-chalcogenide compounds belong to a variety of layered crystals that can be implemented in van der Waals heterostructures. Here we report an optical study of the stability of two of these compounds: indium selenide (InSe) and gallium selenide (GaSe). Micro-photoluminescence (PL) and Raman spectroscopy are used to determine how the properties of thin films of these materials change when they are exposed to air at room temperature. We find that in GaSe films, PL signal decreases on average below 50% over 24 (72) hours of exposure for films with thicknesses 10-25 (48-75) nm. In contras"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.05619","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":"2026-05-18T01:44:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7OdMM7kPH5ItNHYnrFAyifeiS7GCe3h2QiCnU4ePyOOcHY8bc/YsDv1+qxyxBNRxCYm2Om7ca+yYpHtzgicSAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T23:29:45.283556Z"},"content_sha256":"49d8a53636e7a4e0908410d1cdba301461555489a46c70cf5aac3fde6ca4af8b","schema_version":"1.0","event_id":"sha256:49d8a53636e7a4e0908410d1cdba301461555489a46c70cf5aac3fde6ca4af8b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LIV4LYZ4QKTLDK6YCVRYJUBZSW/bundle.json","state_url":"https://pith.science/pith/LIV4LYZ4QKTLDK6YCVRYJUBZSW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LIV4LYZ4QKTLDK6YCVRYJUBZSW/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":"2026-05-20T23:29:45Z","links":{"resolver":"https://pith.science/pith/LIV4LYZ4QKTLDK6YCVRYJUBZSW","bundle":"https://pith.science/pith/LIV4LYZ4QKTLDK6YCVRYJUBZSW/bundle.json","state":"https://pith.science/pith/LIV4LYZ4QKTLDK6YCVRYJUBZSW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LIV4LYZ4QKTLDK6YCVRYJUBZSW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:LIV4LYZ4QKTLDK6YCVRYJUBZSW","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":"06f592628a63d8ae10237ec7a21d540f72c6578ba6e11da77a29730fba165cad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-06-18T10:47:13Z","title_canon_sha256":"428a27fa44682bbf127d48099e7e38891e333d6342bb1a5c9c17af1bc84c1548"},"schema_version":"1.0","source":{"id":"1506.05619","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.05619","created_at":"2026-05-18T01:44:10Z"},{"alias_kind":"arxiv_version","alias_value":"1506.05619v1","created_at":"2026-05-18T01:44:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.05619","created_at":"2026-05-18T01:44:10Z"},{"alias_kind":"pith_short_12","alias_value":"LIV4LYZ4QKTL","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LIV4LYZ4QKTLDK6Y","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LIV4LYZ4","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:49d8a53636e7a4e0908410d1cdba301461555489a46c70cf5aac3fde6ca4af8b","target":"graph","created_at":"2026-05-18T01:44:10Z","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":"Layered III-chalcogenide compounds belong to a variety of layered crystals that can be implemented in van der Waals heterostructures. Here we report an optical study of the stability of two of these compounds: indium selenide (InSe) and gallium selenide (GaSe). Micro-photoluminescence (PL) and Raman spectroscopy are used to determine how the properties of thin films of these materials change when they are exposed to air at room temperature. We find that in GaSe films, PL signal decreases on average below 50% over 24 (72) hours of exposure for films with thicknesses 10-25 (48-75) nm. In contras","authors_text":"A. I. Dmitriev, A. I. Tartakovskii, D. N. Borisenko, E. A. Chekhovich, E. Margapoti, G. V. Lashkarev, J. J. Finley, J. Klein, N. N. Kolesnikov, O. Ceylan, O. Del Pozo-Zamudio, R. C. Schofield, S. Schwarz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-06-18T10:47:13Z","title":"Photoluminescence and Raman investigation of stability of InSe and GaSe thin films"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.05619","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":"sha256:45746ccd65df87ae1cb50852466b90978e7c1aafa32e7c769a6ab4c6c458fa0e","target":"record","created_at":"2026-05-18T01:44:10Z","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":"06f592628a63d8ae10237ec7a21d540f72c6578ba6e11da77a29730fba165cad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-06-18T10:47:13Z","title_canon_sha256":"428a27fa44682bbf127d48099e7e38891e333d6342bb1a5c9c17af1bc84c1548"},"schema_version":"1.0","source":{"id":"1506.05619","kind":"arxiv","version":1}},"canonical_sha256":"5a2bc5e33c82a6b1abd8156384d0399585b3c5cedb8fb652cfdee4ae596e0566","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a2bc5e33c82a6b1abd8156384d0399585b3c5cedb8fb652cfdee4ae596e0566","first_computed_at":"2026-05-18T01:44:10.178857Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:10.178857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WoXy1HaXXdp8LNQI+n9QCi3boCxx9VcW0BmBgTLLsdcnWAoajhDA1UF4Fd6rBzxEkiYwjbJwjAfyvkmjevhcDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:10.179503Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.05619","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:45746ccd65df87ae1cb50852466b90978e7c1aafa32e7c769a6ab4c6c458fa0e","sha256:49d8a53636e7a4e0908410d1cdba301461555489a46c70cf5aac3fde6ca4af8b"],"state_sha256":"36e99df3d346631cf8c861f1a8958f28c8445de3e46aa1d9a5e47d60020ad66b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZeY3VKxeaX6X3McYZCFBY0VNIpwX708lHHGfrLh5uBGFs8s84CxrG6HEQdweWKqqZ32KAsK/vEPYiijowO9wDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T23:29:45.287523Z","bundle_sha256":"e7012bd28cd75335c03676bac5fd1a102093066ffcc8f0a7a1542336ec3a7600"}}