{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:A2EPCWIYQ2O3GLXOBOTWEFYA7E","short_pith_number":"pith:A2EPCWIY","canonical_record":{"source":{"id":"2505.24833","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.other","submitted_at":"2025-05-30T17:35:04Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"deeee5dc168ebc664f1e9400d415b630573d220596def4f3d14f2fa4e453a577","abstract_canon_sha256":"6ea80b2d1d8919b730bb927ea695c7167b84514c5f6add47fc6e2c339f42969a"},"schema_version":"1.0"},"canonical_sha256":"0688f15918869db32eee0ba7621700f9171d7236643dae1d1a9d322a12b7f5ec","source":{"kind":"arxiv","id":"2505.24833","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.24833","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"arxiv_version","alias_value":"2505.24833v1","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.24833","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"pith_short_12","alias_value":"A2EPCWIYQ2O3","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"pith_short_16","alias_value":"A2EPCWIYQ2O3GLXO","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"pith_short_8","alias_value":"A2EPCWIY","created_at":"2026-07-05T11:12:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:A2EPCWIYQ2O3GLXOBOTWEFYA7E","target":"record","payload":{"canonical_record":{"source":{"id":"2505.24833","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.other","submitted_at":"2025-05-30T17:35:04Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"deeee5dc168ebc664f1e9400d415b630573d220596def4f3d14f2fa4e453a577","abstract_canon_sha256":"6ea80b2d1d8919b730bb927ea695c7167b84514c5f6add47fc6e2c339f42969a"},"schema_version":"1.0"},"canonical_sha256":"0688f15918869db32eee0ba7621700f9171d7236643dae1d1a9d322a12b7f5ec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:12:57.560070Z","signature_b64":"YVjQHV8ZEkldGUmpjYMImaeTB+XpuccyPFN4WIRtOMsJ2f0BkhZsxxOle79CI7YNpDDDcxknq0vL3rLgG/ySAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0688f15918869db32eee0ba7621700f9171d7236643dae1d1a9d322a12b7f5ec","last_reissued_at":"2026-07-05T11:12:57.559483Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:12:57.559483Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.24833","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":"2026-07-05T11:12:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/R1CQFYwqDICywObgS6vn1e+kjADoBQHRPB3KcC/irNyEV/ZoJQRXqcHOLWMtBN8FyCK6D/oAJlJY0PeOby6AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T19:06:15.842460Z"},"content_sha256":"93206150720860bd226bd8d28d5bc3b8962c6de4fec06ff560fb4cf06ccf47f9","schema_version":"1.0","event_id":"sha256:93206150720860bd226bd8d28d5bc3b8962c6de4fec06ff560fb4cf06ccf47f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:A2EPCWIYQ2O3GLXOBOTWEFYA7E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cryogenic scanning photocurrent spectroscopy for materials responses to structured optical fields","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"cond-mat.other","authors_text":"Akiyoshi Park, Beining Rao, Chun-I Lu, Duxing Hao, Nai-Chang Yeh, Siyuan Qiu, Ting-Hua Lu, Wen-Hao Chang, Yann-Wen Lan, Ye-Ru Chen, Yu-Chen Chang, Ziqi Sun","submitted_at":"2025-05-30T17:35:04Z","abstract_excerpt":"Circular dichroism spectroscopy is known to provide important insights into the interplay of different degrees of freedom in quantum materials, and yet spectroscopic study of the optoelectronic responses of quantum materials to structured optical fields, such as light with finite spin and orbital angular momentum, has not yet been widely explored, particularly at cryogenic temperature. Here we demonstrate the design and application of a novel instrument that integrates scanning spectroscopic photocurrent measurements with structured light of controlled spin and orbital angular momentum. For st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.24833","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2505.24833/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T11:12:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WdOM3UIbXb6uy8HuC9os3vZt9REUUL//CdpcoVcRFvn4nKkVpzFfEQKvNllUo/yh1bO86atrWOX9UgUOYOQJBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T19:06:15.842857Z"},"content_sha256":"061554c1ae5c53c591e4094b418611273c92982e37c1fabc3b93833372edb067","schema_version":"1.0","event_id":"sha256:061554c1ae5c53c591e4094b418611273c92982e37c1fabc3b93833372edb067"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A2EPCWIYQ2O3GLXOBOTWEFYA7E/bundle.json","state_url":"https://pith.science/pith/A2EPCWIYQ2O3GLXOBOTWEFYA7E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A2EPCWIYQ2O3GLXOBOTWEFYA7E/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":"2026-07-06T19:06:15Z","links":{"resolver":"https://pith.science/pith/A2EPCWIYQ2O3GLXOBOTWEFYA7E","bundle":"https://pith.science/pith/A2EPCWIYQ2O3GLXOBOTWEFYA7E/bundle.json","state":"https://pith.science/pith/A2EPCWIYQ2O3GLXOBOTWEFYA7E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A2EPCWIYQ2O3GLXOBOTWEFYA7E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:A2EPCWIYQ2O3GLXOBOTWEFYA7E","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":"6ea80b2d1d8919b730bb927ea695c7167b84514c5f6add47fc6e2c339f42969a","cross_cats_sorted":["physics.ins-det"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.other","submitted_at":"2025-05-30T17:35:04Z","title_canon_sha256":"deeee5dc168ebc664f1e9400d415b630573d220596def4f3d14f2fa4e453a577"},"schema_version":"1.0","source":{"id":"2505.24833","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.24833","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"arxiv_version","alias_value":"2505.24833v1","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.24833","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"pith_short_12","alias_value":"A2EPCWIYQ2O3","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"pith_short_16","alias_value":"A2EPCWIYQ2O3GLXO","created_at":"2026-07-05T11:12:57Z"},{"alias_kind":"pith_short_8","alias_value":"A2EPCWIY","created_at":"2026-07-05T11:12:57Z"}],"graph_snapshots":[{"event_id":"sha256:061554c1ae5c53c591e4094b418611273c92982e37c1fabc3b93833372edb067","target":"graph","created_at":"2026-07-05T11:12:57Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2505.24833/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Circular dichroism spectroscopy is known to provide important insights into the interplay of different degrees of freedom in quantum materials, and yet spectroscopic study of the optoelectronic responses of quantum materials to structured optical fields, such as light with finite spin and orbital angular momentum, has not yet been widely explored, particularly at cryogenic temperature. Here we demonstrate the design and application of a novel instrument that integrates scanning spectroscopic photocurrent measurements with structured light of controlled spin and orbital angular momentum. For st","authors_text":"Akiyoshi Park, Beining Rao, Chun-I Lu, Duxing Hao, Nai-Chang Yeh, Siyuan Qiu, Ting-Hua Lu, Wen-Hao Chang, Yann-Wen Lan, Ye-Ru Chen, Yu-Chen Chang, Ziqi Sun","cross_cats":["physics.ins-det"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.other","submitted_at":"2025-05-30T17:35:04Z","title":"Cryogenic scanning photocurrent spectroscopy for materials responses to structured optical fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.24833","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":"sha256:93206150720860bd226bd8d28d5bc3b8962c6de4fec06ff560fb4cf06ccf47f9","target":"record","created_at":"2026-07-05T11:12:57Z","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":"6ea80b2d1d8919b730bb927ea695c7167b84514c5f6add47fc6e2c339f42969a","cross_cats_sorted":["physics.ins-det"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.other","submitted_at":"2025-05-30T17:35:04Z","title_canon_sha256":"deeee5dc168ebc664f1e9400d415b630573d220596def4f3d14f2fa4e453a577"},"schema_version":"1.0","source":{"id":"2505.24833","kind":"arxiv","version":1}},"canonical_sha256":"0688f15918869db32eee0ba7621700f9171d7236643dae1d1a9d322a12b7f5ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0688f15918869db32eee0ba7621700f9171d7236643dae1d1a9d322a12b7f5ec","first_computed_at":"2026-07-05T11:12:57.559483Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:12:57.559483Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YVjQHV8ZEkldGUmpjYMImaeTB+XpuccyPFN4WIRtOMsJ2f0BkhZsxxOle79CI7YNpDDDcxknq0vL3rLgG/ySAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:12:57.560070Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.24833","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93206150720860bd226bd8d28d5bc3b8962c6de4fec06ff560fb4cf06ccf47f9","sha256:061554c1ae5c53c591e4094b418611273c92982e37c1fabc3b93833372edb067"],"state_sha256":"13669c8b5467b0fc1054c454cf20b8933e7e7ecd455f5c60f2096cb943256793"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Il0YlY+TgLXhazizmjA8hHvuqCxfWoRSwr06MEFFkudxgPrAFtcT695esSofg0oShnD3jRmpQN/B7gmN56smCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T19:06:15.844837Z","bundle_sha256":"cf857f8166635ccdf1f0f694f2f1c2290fbd1edf14dac15f83783eab627b702e"}}