{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:DW7WR3FONJATINIZS46HLOOXTO","short_pith_number":"pith:DW7WR3FO","canonical_record":{"source":{"id":"1904.13068","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-04-30T06:26:20Z","cross_cats_sorted":[],"title_canon_sha256":"66856ee71627a012b34d26ba8c3e194626e733d49b694eb6bbb9836649df021d","abstract_canon_sha256":"80951dca20de318906d800527111f82df3ca178b826aa16fff895d03ee36baf6"},"schema_version":"1.0"},"canonical_sha256":"1dbf68ecae6a41343519973c75b9d79b86b6510c1356740f27a1d8f9caf8eb5f","source":{"kind":"arxiv","id":"1904.13068","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.13068","created_at":"2026-05-17T23:39:43Z"},{"alias_kind":"arxiv_version","alias_value":"1904.13068v1","created_at":"2026-05-17T23:39:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.13068","created_at":"2026-05-17T23:39:43Z"},{"alias_kind":"pith_short_12","alias_value":"DW7WR3FONJAT","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DW7WR3FONJATINIZ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DW7WR3FO","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:DW7WR3FONJATINIZS46HLOOXTO","target":"record","payload":{"canonical_record":{"source":{"id":"1904.13068","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-04-30T06:26:20Z","cross_cats_sorted":[],"title_canon_sha256":"66856ee71627a012b34d26ba8c3e194626e733d49b694eb6bbb9836649df021d","abstract_canon_sha256":"80951dca20de318906d800527111f82df3ca178b826aa16fff895d03ee36baf6"},"schema_version":"1.0"},"canonical_sha256":"1dbf68ecae6a41343519973c75b9d79b86b6510c1356740f27a1d8f9caf8eb5f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:39:43.934049Z","signature_b64":"qbWOQUn0jnVq66+xtGxrsCJG2xk5TeemI/NTcHoA+yTzoItbMPzugnZymmYnZaRmGNIIaDJwF2FDPlcz9LKyCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1dbf68ecae6a41343519973c75b9d79b86b6510c1356740f27a1d8f9caf8eb5f","last_reissued_at":"2026-05-17T23:39:43.933376Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:39:43.933376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.13068","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":"2026-05-17T23:39:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m9AVMkQ6zRXpe4ViOUfXufxhQ1DgQUyCFuUnvenOOp5/i/Fuw47O90OpIume9GHjKKPyB8qJLegQZONCM1I7DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T15:04:07.330252Z"},"content_sha256":"0bbd1aa5131979d6b28fbb46b60f9ccff593c29606ce31651aae78f9b982c0af","schema_version":"1.0","event_id":"sha256:0bbd1aa5131979d6b28fbb46b60f9ccff593c29606ce31651aae78f9b982c0af"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:DW7WR3FONJATINIZS46HLOOXTO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Prediction of Coupled Electronic and Phononic Ferroelectricity in Strained 2D h-NbN: First-principles Theoretical Analysis","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Anuja Chanana, Umesh V. Waghmare","submitted_at":"2019-04-30T06:26:20Z","abstract_excerpt":"Using first-principles density functional theoretical analysis, we predict coexisting ferroelectric and semi-metallic states in two-dimensional monolayer of h-NbN subjected to electric field and in-plane strain ($\\epsilon$). At strains close to $\\epsilon$=4.85%, where its out-of-plane spontaneous polarization changes sign without inverting the structure, we demonstrate a hysteretic response of its structure and polarization to electric field, and uncover a three-state (P=$\\pm$P$_o$Po, 0) switching during which h-NbN passes through Dirac semi-metallic states. With first-principles evidence for "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.13068","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:39:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q+u2tvXCYMhLzK/HUPcW2sJJbOs75vi/41DAxxMVXbrDYJzSXK0smcm/BD1bFKseYET/xiR6sY4BSq2PONFrAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T15:04:07.330943Z"},"content_sha256":"9059cac81734a13d858d0fed36c5e0bacc966b25901eba12800d8fe4e972e809","schema_version":"1.0","event_id":"sha256:9059cac81734a13d858d0fed36c5e0bacc966b25901eba12800d8fe4e972e809"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DW7WR3FONJATINIZS46HLOOXTO/bundle.json","state_url":"https://pith.science/pith/DW7WR3FONJATINIZS46HLOOXTO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DW7WR3FONJATINIZS46HLOOXTO/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":"2026-05-24T15:04:07Z","links":{"resolver":"https://pith.science/pith/DW7WR3FONJATINIZS46HLOOXTO","bundle":"https://pith.science/pith/DW7WR3FONJATINIZS46HLOOXTO/bundle.json","state":"https://pith.science/pith/DW7WR3FONJATINIZS46HLOOXTO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DW7WR3FONJATINIZS46HLOOXTO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:DW7WR3FONJATINIZS46HLOOXTO","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":"80951dca20de318906d800527111f82df3ca178b826aa16fff895d03ee36baf6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-04-30T06:26:20Z","title_canon_sha256":"66856ee71627a012b34d26ba8c3e194626e733d49b694eb6bbb9836649df021d"},"schema_version":"1.0","source":{"id":"1904.13068","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.13068","created_at":"2026-05-17T23:39:43Z"},{"alias_kind":"arxiv_version","alias_value":"1904.13068v1","created_at":"2026-05-17T23:39:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.13068","created_at":"2026-05-17T23:39:43Z"},{"alias_kind":"pith_short_12","alias_value":"DW7WR3FONJAT","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DW7WR3FONJATINIZ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DW7WR3FO","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:9059cac81734a13d858d0fed36c5e0bacc966b25901eba12800d8fe4e972e809","target":"graph","created_at":"2026-05-17T23:39:43Z","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":"Using first-principles density functional theoretical analysis, we predict coexisting ferroelectric and semi-metallic states in two-dimensional monolayer of h-NbN subjected to electric field and in-plane strain ($\\epsilon$). At strains close to $\\epsilon$=4.85%, where its out-of-plane spontaneous polarization changes sign without inverting the structure, we demonstrate a hysteretic response of its structure and polarization to electric field, and uncover a three-state (P=$\\pm$P$_o$Po, 0) switching during which h-NbN passes through Dirac semi-metallic states. With first-principles evidence for ","authors_text":"Anuja Chanana, Umesh V. Waghmare","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-04-30T06:26:20Z","title":"Prediction of Coupled Electronic and Phononic Ferroelectricity in Strained 2D h-NbN: First-principles Theoretical Analysis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.13068","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":"sha256:0bbd1aa5131979d6b28fbb46b60f9ccff593c29606ce31651aae78f9b982c0af","target":"record","created_at":"2026-05-17T23:39:43Z","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":"80951dca20de318906d800527111f82df3ca178b826aa16fff895d03ee36baf6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-04-30T06:26:20Z","title_canon_sha256":"66856ee71627a012b34d26ba8c3e194626e733d49b694eb6bbb9836649df021d"},"schema_version":"1.0","source":{"id":"1904.13068","kind":"arxiv","version":1}},"canonical_sha256":"1dbf68ecae6a41343519973c75b9d79b86b6510c1356740f27a1d8f9caf8eb5f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1dbf68ecae6a41343519973c75b9d79b86b6510c1356740f27a1d8f9caf8eb5f","first_computed_at":"2026-05-17T23:39:43.933376Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:43.933376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qbWOQUn0jnVq66+xtGxrsCJG2xk5TeemI/NTcHoA+yTzoItbMPzugnZymmYnZaRmGNIIaDJwF2FDPlcz9LKyCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:43.934049Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.13068","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0bbd1aa5131979d6b28fbb46b60f9ccff593c29606ce31651aae78f9b982c0af","sha256:9059cac81734a13d858d0fed36c5e0bacc966b25901eba12800d8fe4e972e809"],"state_sha256":"191de76cd59a8c3d8461dab1705d8f686ba46f33985663f7d63f9c68116b364f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l3sJuqZNVWFyI4MOsvuDP3pQYUOygFjERFPtUA/cy96lYmh8QB5VwTUekIf2Oo0BdAGmsi9tV5tocIYxiT+hBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T15:04:07.335202Z","bundle_sha256":"857c7fb2ae9a0997af34a76df64a453438663f4e20834bf52e755402cea9ae11"}}