{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:OGTHMYAU7L4RNECRDHFMYFBJNM","short_pith_number":"pith:OGTHMYAU","canonical_record":{"source":{"id":"1802.02276","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-07T00:53:26Z","cross_cats_sorted":[],"title_canon_sha256":"b07d3ad10f84e1d7452c4ee2682aefbe618140b39fe07e8c5c925b133fc5b73e","abstract_canon_sha256":"694a37c4292e08b5b623dacec595c7b1ae08a47bc9de3ee9a60070d4f57a7f20"},"schema_version":"1.0"},"canonical_sha256":"71a6766014faf916905119cacc14296b1e16e0bbbfb001b1342af8b29b21ce81","source":{"kind":"arxiv","id":"1802.02276","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.02276","created_at":"2026-05-18T00:24:08Z"},{"alias_kind":"arxiv_version","alias_value":"1802.02276v1","created_at":"2026-05-18T00:24:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02276","created_at":"2026-05-18T00:24:08Z"},{"alias_kind":"pith_short_12","alias_value":"OGTHMYAU7L4R","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OGTHMYAU7L4RNECR","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OGTHMYAU","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:OGTHMYAU7L4RNECRDHFMYFBJNM","target":"record","payload":{"canonical_record":{"source":{"id":"1802.02276","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-07T00:53:26Z","cross_cats_sorted":[],"title_canon_sha256":"b07d3ad10f84e1d7452c4ee2682aefbe618140b39fe07e8c5c925b133fc5b73e","abstract_canon_sha256":"694a37c4292e08b5b623dacec595c7b1ae08a47bc9de3ee9a60070d4f57a7f20"},"schema_version":"1.0"},"canonical_sha256":"71a6766014faf916905119cacc14296b1e16e0bbbfb001b1342af8b29b21ce81","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:08.710506Z","signature_b64":"477qSTbNcdD1QBFbBMf3robM1jdnCNiO/yi28/biPP2YchMRxTHRt9C11gUk58tZ5bGH6UveqtMrRa29g1+aBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"71a6766014faf916905119cacc14296b1e16e0bbbfb001b1342af8b29b21ce81","last_reissued_at":"2026-05-18T00:24:08.709845Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:08.709845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.02276","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":"2026-05-18T00:24:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/JfORfxdmT9ddNZbZzCb4U1hW2aMJQ2WbxxlRS98hndntGBMwV7Ob+FYCqXeMjZhLE8k9wFWPP+UxKg5gdKtDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T05:14:59.220330Z"},"content_sha256":"7f2c3ae6ef5e2f6a08f2733548d81385f252116692ff79e0af5abac6f75c749b","schema_version":"1.0","event_id":"sha256:7f2c3ae6ef5e2f6a08f2733548d81385f252116692ff79e0af5abac6f75c749b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:OGTHMYAU7L4RNECRDHFMYFBJNM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Twelve Inequivalent Dirac Cones in Two-Dimensional ZrB2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alejandro Lopez-Bezanilla","submitted_at":"2018-02-07T00:53:26Z","abstract_excerpt":"Theoretical evidence of the existence of 12 inequivalent Dirac cones at the vicinity of the Fermi energy in monolayered ZrB$_2$ is presented. Two-dimensional ZrB$_2$ is a mechanically stable d- and p-orbital compound exhibiting a unique electronic structure with two Dirac cones out of high-symmetry points in the irreducible Brillouin zone with a small electron-pocket compensation. First-principles calculations demonstrate that while one of the cones is insensitive to lattice expansion, the second cone vanishes for small perturbation of the vertical Zr position. Internal symmetry breaking with "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02276","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":"2026-05-18T00:24:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c8PmGBP00yhoIIayi9Psu/3qmIjpLljpx6v9MuBAVcyaQf7NdMvdGidg0LNXLduGRyYjjl5tKzMG3DtYjLtXBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T05:14:59.221057Z"},"content_sha256":"a6a795092bb51d103df99c74fbd8234f540deb0d2d33bfe5852cf82f5c4e00f7","schema_version":"1.0","event_id":"sha256:a6a795092bb51d103df99c74fbd8234f540deb0d2d33bfe5852cf82f5c4e00f7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OGTHMYAU7L4RNECRDHFMYFBJNM/bundle.json","state_url":"https://pith.science/pith/OGTHMYAU7L4RNECRDHFMYFBJNM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OGTHMYAU7L4RNECRDHFMYFBJNM/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":"2026-06-10T05:14:59Z","links":{"resolver":"https://pith.science/pith/OGTHMYAU7L4RNECRDHFMYFBJNM","bundle":"https://pith.science/pith/OGTHMYAU7L4RNECRDHFMYFBJNM/bundle.json","state":"https://pith.science/pith/OGTHMYAU7L4RNECRDHFMYFBJNM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OGTHMYAU7L4RNECRDHFMYFBJNM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:OGTHMYAU7L4RNECRDHFMYFBJNM","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":"694a37c4292e08b5b623dacec595c7b1ae08a47bc9de3ee9a60070d4f57a7f20","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-07T00:53:26Z","title_canon_sha256":"b07d3ad10f84e1d7452c4ee2682aefbe618140b39fe07e8c5c925b133fc5b73e"},"schema_version":"1.0","source":{"id":"1802.02276","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.02276","created_at":"2026-05-18T00:24:08Z"},{"alias_kind":"arxiv_version","alias_value":"1802.02276v1","created_at":"2026-05-18T00:24:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02276","created_at":"2026-05-18T00:24:08Z"},{"alias_kind":"pith_short_12","alias_value":"OGTHMYAU7L4R","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OGTHMYAU7L4RNECR","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OGTHMYAU","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:a6a795092bb51d103df99c74fbd8234f540deb0d2d33bfe5852cf82f5c4e00f7","target":"graph","created_at":"2026-05-18T00:24:08Z","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":"Theoretical evidence of the existence of 12 inequivalent Dirac cones at the vicinity of the Fermi energy in monolayered ZrB$_2$ is presented. Two-dimensional ZrB$_2$ is a mechanically stable d- and p-orbital compound exhibiting a unique electronic structure with two Dirac cones out of high-symmetry points in the irreducible Brillouin zone with a small electron-pocket compensation. First-principles calculations demonstrate that while one of the cones is insensitive to lattice expansion, the second cone vanishes for small perturbation of the vertical Zr position. Internal symmetry breaking with ","authors_text":"Alejandro Lopez-Bezanilla","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-07T00:53:26Z","title":"Twelve Inequivalent Dirac Cones in Two-Dimensional ZrB2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02276","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":"sha256:7f2c3ae6ef5e2f6a08f2733548d81385f252116692ff79e0af5abac6f75c749b","target":"record","created_at":"2026-05-18T00:24:08Z","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":"694a37c4292e08b5b623dacec595c7b1ae08a47bc9de3ee9a60070d4f57a7f20","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-07T00:53:26Z","title_canon_sha256":"b07d3ad10f84e1d7452c4ee2682aefbe618140b39fe07e8c5c925b133fc5b73e"},"schema_version":"1.0","source":{"id":"1802.02276","kind":"arxiv","version":1}},"canonical_sha256":"71a6766014faf916905119cacc14296b1e16e0bbbfb001b1342af8b29b21ce81","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"71a6766014faf916905119cacc14296b1e16e0bbbfb001b1342af8b29b21ce81","first_computed_at":"2026-05-18T00:24:08.709845Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:24:08.709845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"477qSTbNcdD1QBFbBMf3robM1jdnCNiO/yi28/biPP2YchMRxTHRt9C11gUk58tZ5bGH6UveqtMrRa29g1+aBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:24:08.710506Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.02276","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7f2c3ae6ef5e2f6a08f2733548d81385f252116692ff79e0af5abac6f75c749b","sha256:a6a795092bb51d103df99c74fbd8234f540deb0d2d33bfe5852cf82f5c4e00f7"],"state_sha256":"7b42e6cf99e231068e50ed6b341fd24a834dfda3ec9cc3031ff7130c17a75e2f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6t0C174MJT+NBGjktM3G/PbSB2fsizXdgWqM1rmwidjrFk9V6ftIQzk4LKvgh+nU1Qo/+sF8djqEQ3oZwPXODw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T05:14:59.225388Z","bundle_sha256":"3e4584107f71e2d26262bc2a01d1b675c0ec1329c33557290b1622de51740235"}}