{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HFZAAWEMEZAT5JCQ3LL6EUFTDE","short_pith_number":"pith:HFZAAWEM","canonical_record":{"source":{"id":"1811.09492","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-11-23T14:27:00Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"07c714c5d89853243e9819b200ad521f2eb701387df960ca4699ca314bd329a8","abstract_canon_sha256":"8912eb9a6de71cce95415c55a1739bf10536a28670f4e1fe7d6f6779b95dc7b5"},"schema_version":"1.0"},"canonical_sha256":"397200588c26413ea450dad7e250b3190f85adc504080ad9755bf71c5dd1d7fa","source":{"kind":"arxiv","id":"1811.09492","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.09492","created_at":"2026-05-18T00:00:03Z"},{"alias_kind":"arxiv_version","alias_value":"1811.09492v1","created_at":"2026-05-18T00:00:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.09492","created_at":"2026-05-18T00:00:03Z"},{"alias_kind":"pith_short_12","alias_value":"HFZAAWEMEZAT","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HFZAAWEMEZAT5JCQ","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HFZAAWEM","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HFZAAWEMEZAT5JCQ3LL6EUFTDE","target":"record","payload":{"canonical_record":{"source":{"id":"1811.09492","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-11-23T14:27:00Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"07c714c5d89853243e9819b200ad521f2eb701387df960ca4699ca314bd329a8","abstract_canon_sha256":"8912eb9a6de71cce95415c55a1739bf10536a28670f4e1fe7d6f6779b95dc7b5"},"schema_version":"1.0"},"canonical_sha256":"397200588c26413ea450dad7e250b3190f85adc504080ad9755bf71c5dd1d7fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:03.221275Z","signature_b64":"ERnfRgc7hC8lR2TW2LXMyadW9Z5eqDBOslXdRACL5GSlCwM3lYN600j/hEbn3Bgu+Em4+k9gFGz5+XMJs04wAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"397200588c26413ea450dad7e250b3190f85adc504080ad9755bf71c5dd1d7fa","last_reissued_at":"2026-05-18T00:00:03.220751Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:03.220751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.09492","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":"2026-05-18T00:00:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RZZg3gltuRFRkQPsWpmA/dDpWODUfvblqWLcCZOgpBqu4pLnF0jj4ChUPdi9a4uQdlzE/qmvHVipO2B6iTDkCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:24:01.984811Z"},"content_sha256":"146dfd8350c6555eb3c0ac4057fc40ef0194b98ee5e3a88827ad7fe99798ed50","schema_version":"1.0","event_id":"sha256:146dfd8350c6555eb3c0ac4057fc40ef0194b98ee5e3a88827ad7fe99798ed50"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HFZAAWEMEZAT5JCQ3LL6EUFTDE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Recipe for Dirac Phonon States with Quantized Valley Berry Phase in Two Dimensional Hexagonal Lattices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Hu Xu, Rui Wang, Yuanjun Jin","submitted_at":"2018-11-23T14:27:00Z","abstract_excerpt":"The topological quantum states in two-dimensional (2D) materials are fascinating subjects of research, which usually highlight electron-related systems. In this work, we present a recipe that leads to Dirac phonon states with quantized valley Berry phase in 2D hexagonal lattices by first-principles calculations. We show that candidates possessing the three-fold rotational symmetry at the corners of the hexagonal Brillouin zone host valley Dirac phonons, which are guaranteed to remain intact with respect to perturbations. We identify that such special topological features populated by Dirac pho"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.09492","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":"2026-05-18T00:00:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cm8rHIbcTv88vMPyJsdSsCI/QpAS30wisZWMakfxwfC6uFBH3X8qQzZbfK/TcMGGeiEXAkILUlxxXzaKEe9wDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:24:01.985606Z"},"content_sha256":"fbea819f47c007ca26941d63b3d3f15fd6e7e6955597d9975093f2f1f429628b","schema_version":"1.0","event_id":"sha256:fbea819f47c007ca26941d63b3d3f15fd6e7e6955597d9975093f2f1f429628b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HFZAAWEMEZAT5JCQ3LL6EUFTDE/bundle.json","state_url":"https://pith.science/pith/HFZAAWEMEZAT5JCQ3LL6EUFTDE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HFZAAWEMEZAT5JCQ3LL6EUFTDE/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":"2026-05-31T11:24:01Z","links":{"resolver":"https://pith.science/pith/HFZAAWEMEZAT5JCQ3LL6EUFTDE","bundle":"https://pith.science/pith/HFZAAWEMEZAT5JCQ3LL6EUFTDE/bundle.json","state":"https://pith.science/pith/HFZAAWEMEZAT5JCQ3LL6EUFTDE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HFZAAWEMEZAT5JCQ3LL6EUFTDE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HFZAAWEMEZAT5JCQ3LL6EUFTDE","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":"8912eb9a6de71cce95415c55a1739bf10536a28670f4e1fe7d6f6779b95dc7b5","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-11-23T14:27:00Z","title_canon_sha256":"07c714c5d89853243e9819b200ad521f2eb701387df960ca4699ca314bd329a8"},"schema_version":"1.0","source":{"id":"1811.09492","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.09492","created_at":"2026-05-18T00:00:03Z"},{"alias_kind":"arxiv_version","alias_value":"1811.09492v1","created_at":"2026-05-18T00:00:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.09492","created_at":"2026-05-18T00:00:03Z"},{"alias_kind":"pith_short_12","alias_value":"HFZAAWEMEZAT","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HFZAAWEMEZAT5JCQ","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HFZAAWEM","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:fbea819f47c007ca26941d63b3d3f15fd6e7e6955597d9975093f2f1f429628b","target":"graph","created_at":"2026-05-18T00:00:03Z","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 topological quantum states in two-dimensional (2D) materials are fascinating subjects of research, which usually highlight electron-related systems. In this work, we present a recipe that leads to Dirac phonon states with quantized valley Berry phase in 2D hexagonal lattices by first-principles calculations. We show that candidates possessing the three-fold rotational symmetry at the corners of the hexagonal Brillouin zone host valley Dirac phonons, which are guaranteed to remain intact with respect to perturbations. We identify that such special topological features populated by Dirac pho","authors_text":"Hu Xu, Rui Wang, Yuanjun Jin","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-11-23T14:27:00Z","title":"Recipe for Dirac Phonon States with Quantized Valley Berry Phase in Two Dimensional Hexagonal Lattices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.09492","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":"sha256:146dfd8350c6555eb3c0ac4057fc40ef0194b98ee5e3a88827ad7fe99798ed50","target":"record","created_at":"2026-05-18T00:00:03Z","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":"8912eb9a6de71cce95415c55a1739bf10536a28670f4e1fe7d6f6779b95dc7b5","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-11-23T14:27:00Z","title_canon_sha256":"07c714c5d89853243e9819b200ad521f2eb701387df960ca4699ca314bd329a8"},"schema_version":"1.0","source":{"id":"1811.09492","kind":"arxiv","version":1}},"canonical_sha256":"397200588c26413ea450dad7e250b3190f85adc504080ad9755bf71c5dd1d7fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"397200588c26413ea450dad7e250b3190f85adc504080ad9755bf71c5dd1d7fa","first_computed_at":"2026-05-18T00:00:03.220751Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:03.220751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ERnfRgc7hC8lR2TW2LXMyadW9Z5eqDBOslXdRACL5GSlCwM3lYN600j/hEbn3Bgu+Em4+k9gFGz5+XMJs04wAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:03.221275Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.09492","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:146dfd8350c6555eb3c0ac4057fc40ef0194b98ee5e3a88827ad7fe99798ed50","sha256:fbea819f47c007ca26941d63b3d3f15fd6e7e6955597d9975093f2f1f429628b"],"state_sha256":"910d66e6cf741c2dc25d754e2c9c396d6fee88494b3f32f38ac33d63cdff2f0f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XayYTdCYXBFduxnWmjwFMBQ+VY4XNXoVcDXzsEIElolJGrHWK1f2lJx2UUknKUtQM3UdAwG/reYsEkAZ24AyAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T11:24:01.989861Z","bundle_sha256":"5d477c0184c445b79333dfb66afc561eabdf07e26e04b6182edbd499de5f3e52"}}