{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NSQ3ASIHSGIZRJKIW5J6ISUB2Q","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":"e5cc0fc6c6aeef5d020ccdd061dd0e8a90a48e62f5a06c1073c06ab92924d048","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-10-10T20:46:14Z","title_canon_sha256":"38be313374bb6344187ae382ec0d0e5deeedb546596077857f5fdd4685bce5c3"},"schema_version":"1.0","source":{"id":"1810.04745","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.04745","created_at":"2026-05-18T00:03:36Z"},{"alias_kind":"arxiv_version","alias_value":"1810.04745v1","created_at":"2026-05-18T00:03:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.04745","created_at":"2026-05-18T00:03:36Z"},{"alias_kind":"pith_short_12","alias_value":"NSQ3ASIHSGIZ","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NSQ3ASIHSGIZRJKI","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NSQ3ASIH","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:2c0afb5af512f8a9fb64eda856b1dc89da18074036966dd86803280e0c718b02","target":"graph","created_at":"2026-05-18T00:03:36Z","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":"The research field of two dimensional (2D) materials strongly relies on optical microscopy characterization tools to identify atomically thin materials and to determine their number of layers. Moreover, optical microscopy-based techniques opened the door to study the optical properties of these nanomaterials. We presented a comprehensive study of the differential reflectance spectra of 2D semiconducting transition metal dichalcogenides (TMDCs), MoS2, MoSe2, WS2, and WSe2, with thickness ranging from one layer up to six layers. We analyzed the thickness-dependent energy of the different exciton","authors_text":"Aday J. Molina-Mendoza, Andres Castellanos-Gomez, David Barcons, David Perez de Lara, Matthias Dr\\\"uppel, Michael Rohlfing, Najme S. Taghavi, Patricia Gant, Philipp Marauhn, Riccardo Frisenda, Robert Schmidt, Rudolf Bratschitsch, Sergio Gonzalez-Abad, Steffen Michaelis de Vasconcellos, Yue Niu","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-10-10T20:46:14Z","title":"Thickness-Dependent Differential Reflectance Spectra of Monolayer and Few-Layer MoS2, MoSe2, WS2 and WSe2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.04745","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":"sha256:9368cb6632d6d4e6dc4449415c56a10a5714c334b75ee4f297e675186f33045a","target":"record","created_at":"2026-05-18T00:03:36Z","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":"e5cc0fc6c6aeef5d020ccdd061dd0e8a90a48e62f5a06c1073c06ab92924d048","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-10-10T20:46:14Z","title_canon_sha256":"38be313374bb6344187ae382ec0d0e5deeedb546596077857f5fdd4685bce5c3"},"schema_version":"1.0","source":{"id":"1810.04745","kind":"arxiv","version":1}},"canonical_sha256":"6ca1b04907919198a548b753e44a81d41fee9a428226e6d85cd9cc6a83f2572c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6ca1b04907919198a548b753e44a81d41fee9a428226e6d85cd9cc6a83f2572c","first_computed_at":"2026-05-18T00:03:36.025876Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:36.025876Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BFfsZQSrw0/5JofnfX21Z+mtzQl3tdbkbqNZUCmKCF/W8OBv+RVBLgqsvrNY8SMMYtwop8P9fIi2tnwLfoaEDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:36.026330Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.04745","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9368cb6632d6d4e6dc4449415c56a10a5714c334b75ee4f297e675186f33045a","sha256:2c0afb5af512f8a9fb64eda856b1dc89da18074036966dd86803280e0c718b02"],"state_sha256":"c869637372ccc357f0bf264f513fa84ea7dc40e40ebd1f9a7eb9aba1bdc61933"}