{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:QLCSTVJJQSIKAMNKROXG5DDQSG","short_pith_number":"pith:QLCSTVJJ","schema_version":"1.0","canonical_sha256":"82c529d5298490a031aa8bae6e8c7091b36586d7cdff36e82f2fecf6d6b7a628","source":{"kind":"arxiv","id":"1304.4289","version":1},"attestation_state":"computed","paper":{"title":"Observation of Intense Second Harmonic Generation from MoS$_{2}$ Atomic Crystals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Ana M. de Paula, Ana Paula M. Barboza, Kin Fai Mak, Leandro M. Malard, Thonimar V. Alencar","submitted_at":"2013-04-15T23:08:11Z","abstract_excerpt":"Since de discovery of graphene, the family of 2-dimensional materials has attracted much recent attention. In this work, the nonlinear optical properties of few-layer MoS2 two-dimensional crystals are studied using femtosecond laser pulses. We observed highly efficient second harmonic generation from the odd-layer crystals, which shows a polarization intensity dependence that directly reveals the underlying symmetry and orientation of the crystal. Additionally, the measured second-order susceptibility spectra provide information about the electronic structure of the material. Our results open "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1304.4289","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-04-15T23:08:11Z","cross_cats_sorted":[],"title_canon_sha256":"4cd3cd12c2a18db0f98615e32dbf1b296083d294c123365a9402bcda3834efc3","abstract_canon_sha256":"5d8db7bf725e65b233b4a8226fd2ef4c8479982fbb3c47f55f591a591322e8c6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:20:34.985786Z","signature_b64":"703HSJ6qozjqPEydaQYVpYoOoDSDM6JU4h2+7TwA43p+7z+kj14tdvdut3JhGKRzk+4U+rAWQZalIsAo472LAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"82c529d5298490a031aa8bae6e8c7091b36586d7cdff36e82f2fecf6d6b7a628","last_reissued_at":"2026-05-18T03:20:34.984865Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:20:34.984865Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observation of Intense Second Harmonic Generation from MoS$_{2}$ Atomic Crystals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Ana M. de Paula, Ana Paula M. Barboza, Kin Fai Mak, Leandro M. Malard, Thonimar V. Alencar","submitted_at":"2013-04-15T23:08:11Z","abstract_excerpt":"Since de discovery of graphene, the family of 2-dimensional materials has attracted much recent attention. In this work, the nonlinear optical properties of few-layer MoS2 two-dimensional crystals are studied using femtosecond laser pulses. We observed highly efficient second harmonic generation from the odd-layer crystals, which shows a polarization intensity dependence that directly reveals the underlying symmetry and orientation of the crystal. Additionally, the measured second-order susceptibility spectra provide information about the electronic structure of the material. Our results open "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.4289","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1304.4289","created_at":"2026-05-18T03:20:34.985031+00:00"},{"alias_kind":"arxiv_version","alias_value":"1304.4289v1","created_at":"2026-05-18T03:20:34.985031+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.4289","created_at":"2026-05-18T03:20:34.985031+00:00"},{"alias_kind":"pith_short_12","alias_value":"QLCSTVJJQSIK","created_at":"2026-05-18T12:27:57.521954+00:00"},{"alias_kind":"pith_short_16","alias_value":"QLCSTVJJQSIKAMNK","created_at":"2026-05-18T12:27:57.521954+00:00"},{"alias_kind":"pith_short_8","alias_value":"QLCSTVJJ","created_at":"2026-05-18T12:27:57.521954+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/QLCSTVJJQSIKAMNKROXG5DDQSG","json":"https://pith.science/pith/QLCSTVJJQSIKAMNKROXG5DDQSG.json","graph_json":"https://pith.science/api/pith-number/QLCSTVJJQSIKAMNKROXG5DDQSG/graph.json","events_json":"https://pith.science/api/pith-number/QLCSTVJJQSIKAMNKROXG5DDQSG/events.json","paper":"https://pith.science/paper/QLCSTVJJ"},"agent_actions":{"view_html":"https://pith.science/pith/QLCSTVJJQSIKAMNKROXG5DDQSG","download_json":"https://pith.science/pith/QLCSTVJJQSIKAMNKROXG5DDQSG.json","view_paper":"https://pith.science/paper/QLCSTVJJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1304.4289&json=true","fetch_graph":"https://pith.science/api/pith-number/QLCSTVJJQSIKAMNKROXG5DDQSG/graph.json","fetch_events":"https://pith.science/api/pith-number/QLCSTVJJQSIKAMNKROXG5DDQSG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QLCSTVJJQSIKAMNKROXG5DDQSG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QLCSTVJJQSIKAMNKROXG5DDQSG/action/storage_attestation","attest_author":"https://pith.science/pith/QLCSTVJJQSIKAMNKROXG5DDQSG/action/author_attestation","sign_citation":"https://pith.science/pith/QLCSTVJJQSIKAMNKROXG5DDQSG/action/citation_signature","submit_replication":"https://pith.science/pith/QLCSTVJJQSIKAMNKROXG5DDQSG/action/replication_record"}},"created_at":"2026-05-18T03:20:34.985031+00:00","updated_at":"2026-05-18T03:20:34.985031+00:00"}