{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:UPS2G57WLHBA6RS42ESLDDT2SR","short_pith_number":"pith:UPS2G57W","schema_version":"1.0","canonical_sha256":"a3e5a377f659c20f465cd124b18e7a9447d5f723dc0ff8390aab7ce04087823a","source":{"kind":"arxiv","id":"1801.02551","version":1},"attestation_state":"computed","paper":{"title":"Femtosecond study of A1g phonons in the strong 3D topological insulators: From pump-probe to coherent control","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Jianbo Hu, Kazutaka G. Nakamura, Kyushiro Igarashi, Oleg V. Misochko, Takao Sasagawa","submitted_at":"2018-01-08T16:51:33Z","abstract_excerpt":"Fully symmetric A1g phonons are expected to play a dominant role in electron scattering in strong topological insulators (TIs), thus limiting the ballistic transport of future electronic devices. Here, we report on femtosecond time-resolved observation of a pair of A1g coherent phonons and their optical control in two strong 3D TIs, Bi2Te3 and Bi2Se3, by using a second pump pulse in ultrafast spectroscopy measurements. Along with well-defined phonon properties such as frequency and lifetime, an obvious phonon chirp has been observed, implying a strong coupling between photo-carriers and lattic"},"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":"1801.02551","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-01-08T16:51:33Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"bdccc464bd553b83b716a864f8b75feab704941665341f7b57d19c7ebe8d173a","abstract_canon_sha256":"84985bd6cff4edf61ff274ddff0f5000692e060a3c474f1e1bbb60af1a3dfa25"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:23:27.791665Z","signature_b64":"CzBTjnJqDo7xjwXoPHHbTIabqXhhDaqbudRnm+BqLLYP97yGfg8lR+O1BX2t+h34wVy9jw3xM1A8sQjipnEyBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a3e5a377f659c20f465cd124b18e7a9447d5f723dc0ff8390aab7ce04087823a","last_reissued_at":"2026-05-18T00:23:27.791119Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:23:27.791119Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Femtosecond study of A1g phonons in the strong 3D topological insulators: From pump-probe to coherent control","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Jianbo Hu, Kazutaka G. Nakamura, Kyushiro Igarashi, Oleg V. Misochko, Takao Sasagawa","submitted_at":"2018-01-08T16:51:33Z","abstract_excerpt":"Fully symmetric A1g phonons are expected to play a dominant role in electron scattering in strong topological insulators (TIs), thus limiting the ballistic transport of future electronic devices. Here, we report on femtosecond time-resolved observation of a pair of A1g coherent phonons and their optical control in two strong 3D TIs, Bi2Te3 and Bi2Se3, by using a second pump pulse in ultrafast spectroscopy measurements. Along with well-defined phonon properties such as frequency and lifetime, an obvious phonon chirp has been observed, implying a strong coupling between photo-carriers and lattic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02551","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":"1801.02551","created_at":"2026-05-18T00:23:27.791201+00:00"},{"alias_kind":"arxiv_version","alias_value":"1801.02551v1","created_at":"2026-05-18T00:23:27.791201+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02551","created_at":"2026-05-18T00:23:27.791201+00:00"},{"alias_kind":"pith_short_12","alias_value":"UPS2G57WLHBA","created_at":"2026-05-18T12:32:56.356000+00:00"},{"alias_kind":"pith_short_16","alias_value":"UPS2G57WLHBA6RS4","created_at":"2026-05-18T12:32:56.356000+00:00"},{"alias_kind":"pith_short_8","alias_value":"UPS2G57W","created_at":"2026-05-18T12:32:56.356000+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/UPS2G57WLHBA6RS42ESLDDT2SR","json":"https://pith.science/pith/UPS2G57WLHBA6RS42ESLDDT2SR.json","graph_json":"https://pith.science/api/pith-number/UPS2G57WLHBA6RS42ESLDDT2SR/graph.json","events_json":"https://pith.science/api/pith-number/UPS2G57WLHBA6RS42ESLDDT2SR/events.json","paper":"https://pith.science/paper/UPS2G57W"},"agent_actions":{"view_html":"https://pith.science/pith/UPS2G57WLHBA6RS42ESLDDT2SR","download_json":"https://pith.science/pith/UPS2G57WLHBA6RS42ESLDDT2SR.json","view_paper":"https://pith.science/paper/UPS2G57W","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1801.02551&json=true","fetch_graph":"https://pith.science/api/pith-number/UPS2G57WLHBA6RS42ESLDDT2SR/graph.json","fetch_events":"https://pith.science/api/pith-number/UPS2G57WLHBA6RS42ESLDDT2SR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UPS2G57WLHBA6RS42ESLDDT2SR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UPS2G57WLHBA6RS42ESLDDT2SR/action/storage_attestation","attest_author":"https://pith.science/pith/UPS2G57WLHBA6RS42ESLDDT2SR/action/author_attestation","sign_citation":"https://pith.science/pith/UPS2G57WLHBA6RS42ESLDDT2SR/action/citation_signature","submit_replication":"https://pith.science/pith/UPS2G57WLHBA6RS42ESLDDT2SR/action/replication_record"}},"created_at":"2026-05-18T00:23:27.791201+00:00","updated_at":"2026-05-18T00:23:27.791201+00:00"}