{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:6LXASWXYFN3ESIIPOBHRPHVDBM","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":"ac21ceb4c72256de8d1c81e65b7f6a79cf93739fd9a3f1d8cb1e030e7a8d348e","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-03-25T14:25:36Z","title_canon_sha256":"da01babbd2e401a06e931cd8774e696181be30397309cd3289d95876d01404d9"},"schema_version":"1.0","source":{"id":"1503.07392","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.07392","created_at":"2026-05-18T02:20:21Z"},{"alias_kind":"arxiv_version","alias_value":"1503.07392v1","created_at":"2026-05-18T02:20:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07392","created_at":"2026-05-18T02:20:21Z"},{"alias_kind":"pith_short_12","alias_value":"6LXASWXYFN3E","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6LXASWXYFN3ESIIP","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6LXASWXY","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:aeaef197f8876ec036d044dbd181082c8edc15e81151b9269dc9b175d0ce64cc","target":"graph","created_at":"2026-05-18T02:20:21Z","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":"The metal contacts on 2D black phosphorus field-effect transistor and photodetectors are studied. The metal work functions can significantly impact the Schottky barrier at the metal-semiconductor contact in black phosphorus devices. Higher metal work functions lead to larger output hole currents in p-type transistors, while ambipolar characteristics can be observed with lower work function metals. Photodetectors with record high photoresponsivity (223 mA/W) are demonstrated on black phosphorus through contact-engineering.","authors_text":"Han Liu, Nathan J. Conrad, Peide D. Ye, Xianfan Xu, Yexin Deng, Zhe Luo","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-03-25T14:25:36Z","title":"Towards High-Performance Two-Dimensional Black Phosphorus Optoelectronic Devices: the Role of Metal Contacts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07392","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":"sha256:0e1c3085c06d8664a56ba2963af1487566c8c4bfebb14bb3703984756aa44413","target":"record","created_at":"2026-05-18T02:20:21Z","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":"ac21ceb4c72256de8d1c81e65b7f6a79cf93739fd9a3f1d8cb1e030e7a8d348e","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-03-25T14:25:36Z","title_canon_sha256":"da01babbd2e401a06e931cd8774e696181be30397309cd3289d95876d01404d9"},"schema_version":"1.0","source":{"id":"1503.07392","kind":"arxiv","version":1}},"canonical_sha256":"f2ee095af82b7649210f704f179ea30b318fe4d8c6a38198506de01150456942","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2ee095af82b7649210f704f179ea30b318fe4d8c6a38198506de01150456942","first_computed_at":"2026-05-18T02:20:21.177176Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:20:21.177176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hcmlv0LrYxVPK26Xg7wBxHVdeBpvjeBWGhZ9ZLJbjShFiQlWARWHr7Xbh8dpo5AhyUb8T/tZC0+SzQz/iJ9+AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:20:21.177775Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.07392","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0e1c3085c06d8664a56ba2963af1487566c8c4bfebb14bb3703984756aa44413","sha256:aeaef197f8876ec036d044dbd181082c8edc15e81151b9269dc9b175d0ce64cc"],"state_sha256":"e710abb4f2e36dd032b71a0d15023eda29550e8cc24a0c1651b1dc41b421b278"}