{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:HVN24V2PZ73GC5AT7N66AHSSQR","short_pith_number":"pith:HVN24V2P","canonical_record":{"source":{"id":"2505.18940","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-05-25T02:20:04Z","cross_cats_sorted":[],"title_canon_sha256":"e6ea764e5be1f78f0b208b1d78a9fbb2d7c5fc0f4ffa561aa6ff493f37f396a7","abstract_canon_sha256":"9f26182e4d790c38dc4818ab73f3ba770ca456f427dba02bf0f955a634d589ed"},"schema_version":"1.0"},"canonical_sha256":"3d5bae574fcff6617413fb7de01e528476f2a873b6ab6e6a8ca50314ff4b1249","source":{"kind":"arxiv","id":"2505.18940","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.18940","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"arxiv_version","alias_value":"2505.18940v1","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.18940","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"pith_short_12","alias_value":"HVN24V2PZ73G","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"pith_short_16","alias_value":"HVN24V2PZ73GC5AT","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"pith_short_8","alias_value":"HVN24V2P","created_at":"2026-07-05T11:09:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:HVN24V2PZ73GC5AT7N66AHSSQR","target":"record","payload":{"canonical_record":{"source":{"id":"2505.18940","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-05-25T02:20:04Z","cross_cats_sorted":[],"title_canon_sha256":"e6ea764e5be1f78f0b208b1d78a9fbb2d7c5fc0f4ffa561aa6ff493f37f396a7","abstract_canon_sha256":"9f26182e4d790c38dc4818ab73f3ba770ca456f427dba02bf0f955a634d589ed"},"schema_version":"1.0"},"canonical_sha256":"3d5bae574fcff6617413fb7de01e528476f2a873b6ab6e6a8ca50314ff4b1249","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:09:22.408516Z","signature_b64":"xNhTcL1x7XmmmRhbALxEsMde8m++C8BUTIMKV3j8fTUzk4wLgIjhGi/fuJ4q/UaNEUMpJg1fLPNM02CTsHQCBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3d5bae574fcff6617413fb7de01e528476f2a873b6ab6e6a8ca50314ff4b1249","last_reissued_at":"2026-07-05T11:09:22.407959Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:09:22.407959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.18940","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":"2026-07-05T11:09:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c6Iy3yo4aPrgWzw0OT8mACoso4FcR204A/3Qct8iD+R9U6YTkmhyKNk7sv44XS4nDI8Y6L5UOQ1z4t5JgLPJDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T13:53:19.653869Z"},"content_sha256":"8ffbedf6966c860b9f72667b7402df020b62b34aa6bac158ae10aad58ce74577","schema_version":"1.0","event_id":"sha256:8ffbedf6966c860b9f72667b7402df020b62b34aa6bac158ae10aad58ce74577"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:HVN24V2PZ73GC5AT7N66AHSSQR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First principles investigation of zb-TiSn: A promising narrow bandgap semiconductor","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Sarojini M, Sudeep R, Uma Mahendra Kumar Koppolu","submitted_at":"2025-05-25T02:20:04Z","abstract_excerpt":"We have investigated the structural stability of a binary compound TiSn in the zincblende symmetry. The phonon dispersion studies confirms that, TiSn with a nominal composition of 1:1 can exist in zincblende form. No imaginary frequencies are observed indicating the stable bonding nature of Ti-Sn. From the First principles calculations based on density functional theory, the resulting electronic band structure had revealed that zb-TiSn, is a narrow band gap semiconductor with an energy gap of 0.3 eV with GGA- PBE. The bonding nature is identified as polar covalent, determined from charge densi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.18940","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/2505.18940/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":"2026-07-05T11:09:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z2casoXCL+pFqj44Zej2WB0vHnpkLFXPsWYKJrB43q7sNZf8enVRCa9UTWTItX+W7K8FaCfZZ/26wu6MheFHAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T13:53:19.654397Z"},"content_sha256":"c963d2c6579ea434fe2b624a47fd5633fc97526a0457bfa4155befa94ba314e4","schema_version":"1.0","event_id":"sha256:c963d2c6579ea434fe2b624a47fd5633fc97526a0457bfa4155befa94ba314e4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HVN24V2PZ73GC5AT7N66AHSSQR/bundle.json","state_url":"https://pith.science/pith/HVN24V2PZ73GC5AT7N66AHSSQR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HVN24V2PZ73GC5AT7N66AHSSQR/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":"2026-08-08T13:53:19Z","links":{"resolver":"https://pith.science/pith/HVN24V2PZ73GC5AT7N66AHSSQR","bundle":"https://pith.science/pith/HVN24V2PZ73GC5AT7N66AHSSQR/bundle.json","state":"https://pith.science/pith/HVN24V2PZ73GC5AT7N66AHSSQR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HVN24V2PZ73GC5AT7N66AHSSQR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:HVN24V2PZ73GC5AT7N66AHSSQR","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":"9f26182e4d790c38dc4818ab73f3ba770ca456f427dba02bf0f955a634d589ed","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-05-25T02:20:04Z","title_canon_sha256":"e6ea764e5be1f78f0b208b1d78a9fbb2d7c5fc0f4ffa561aa6ff493f37f396a7"},"schema_version":"1.0","source":{"id":"2505.18940","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.18940","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"arxiv_version","alias_value":"2505.18940v1","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.18940","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"pith_short_12","alias_value":"HVN24V2PZ73G","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"pith_short_16","alias_value":"HVN24V2PZ73GC5AT","created_at":"2026-07-05T11:09:22Z"},{"alias_kind":"pith_short_8","alias_value":"HVN24V2P","created_at":"2026-07-05T11:09:22Z"}],"graph_snapshots":[{"event_id":"sha256:c963d2c6579ea434fe2b624a47fd5633fc97526a0457bfa4155befa94ba314e4","target":"graph","created_at":"2026-07-05T11:09:22Z","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/2505.18940/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have investigated the structural stability of a binary compound TiSn in the zincblende symmetry. The phonon dispersion studies confirms that, TiSn with a nominal composition of 1:1 can exist in zincblende form. No imaginary frequencies are observed indicating the stable bonding nature of Ti-Sn. From the First principles calculations based on density functional theory, the resulting electronic band structure had revealed that zb-TiSn, is a narrow band gap semiconductor with an energy gap of 0.3 eV with GGA- PBE. The bonding nature is identified as polar covalent, determined from charge densi","authors_text":"Sarojini M, Sudeep R, Uma Mahendra Kumar Koppolu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-05-25T02:20:04Z","title":"First principles investigation of zb-TiSn: A promising narrow bandgap semiconductor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.18940","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":"sha256:8ffbedf6966c860b9f72667b7402df020b62b34aa6bac158ae10aad58ce74577","target":"record","created_at":"2026-07-05T11:09:22Z","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":"9f26182e4d790c38dc4818ab73f3ba770ca456f427dba02bf0f955a634d589ed","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-05-25T02:20:04Z","title_canon_sha256":"e6ea764e5be1f78f0b208b1d78a9fbb2d7c5fc0f4ffa561aa6ff493f37f396a7"},"schema_version":"1.0","source":{"id":"2505.18940","kind":"arxiv","version":1}},"canonical_sha256":"3d5bae574fcff6617413fb7de01e528476f2a873b6ab6e6a8ca50314ff4b1249","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3d5bae574fcff6617413fb7de01e528476f2a873b6ab6e6a8ca50314ff4b1249","first_computed_at":"2026-07-05T11:09:22.407959Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:09:22.407959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xNhTcL1x7XmmmRhbALxEsMde8m++C8BUTIMKV3j8fTUzk4wLgIjhGi/fuJ4q/UaNEUMpJg1fLPNM02CTsHQCBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:09:22.408516Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.18940","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8ffbedf6966c860b9f72667b7402df020b62b34aa6bac158ae10aad58ce74577","sha256:c963d2c6579ea434fe2b624a47fd5633fc97526a0457bfa4155befa94ba314e4"],"state_sha256":"13dcedf2b6f109d8b583f43b97789de50f673c86a0280d2f70fdd7efcd0ab80c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rjUkak3U12Euyi/G8OOQC88edR3OKf+Qm0hm1hiwb6qSVeP5AYcoUFFHuQYHVfZyMqS3wUkdwS6J342lQJT6DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T13:53:19.660391Z","bundle_sha256":"309df2ce8bac2b5ea58bb7610fd1027ee4b91ee38d8afc5633b8611f82bdfc69"}}