{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:BETCIZWFOX44LRHQIDNKT5CFL7","short_pith_number":"pith:BETCIZWF","canonical_record":{"source":{"id":"1908.02953","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-08T07:14:06Z","cross_cats_sorted":[],"title_canon_sha256":"bf029950499079a0a0e81423e16e795dea60fb6bd437c1fb99b91973c9e1bc0e","abstract_canon_sha256":"3b4b0606b5adc5b23981d6b8655bf2b4e6b5e8803636366a6bd0f53bc9488ecb"},"schema_version":"1.0"},"canonical_sha256":"09262466c575f9c5c4f040daa9f4455fcd0f586e9b9c3d22aefb801c5288a214","source":{"kind":"arxiv","id":"1908.02953","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02953","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02953v1","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02953","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"pith_short_12","alias_value":"BETCIZWFOX44","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"pith_short_16","alias_value":"BETCIZWFOX44LRHQ","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"pith_short_8","alias_value":"BETCIZWF","created_at":"2026-07-05T00:11:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:BETCIZWFOX44LRHQIDNKT5CFL7","target":"record","payload":{"canonical_record":{"source":{"id":"1908.02953","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-08T07:14:06Z","cross_cats_sorted":[],"title_canon_sha256":"bf029950499079a0a0e81423e16e795dea60fb6bd437c1fb99b91973c9e1bc0e","abstract_canon_sha256":"3b4b0606b5adc5b23981d6b8655bf2b4e6b5e8803636366a6bd0f53bc9488ecb"},"schema_version":"1.0"},"canonical_sha256":"09262466c575f9c5c4f040daa9f4455fcd0f586e9b9c3d22aefb801c5288a214","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:11:04.887869Z","signature_b64":"dWSGYWhtei4UEW/slwWgoaHyu0+bAdqN5t3rLhjAdcG+bTIKFJaqWeFMDpAgwah/pt7hiAdzl/vBmRXmeDs7CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"09262466c575f9c5c4f040daa9f4455fcd0f586e9b9c3d22aefb801c5288a214","last_reissued_at":"2026-07-05T00:11:04.887433Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:11:04.887433Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.02953","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":"2026-07-05T00:11:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OfHGeyNtoe7/J67rcsO4ydVGOoNpWyO6HT1mAjmLlW9MBvBzZaAmBVUi1vCG/Ohqntg8O3J6TbwNyx2GVZchCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T03:40:45.694254Z"},"content_sha256":"cf6ec9d3d037afaf0613ccffe9d3974c9e51a586c80ead9985e143d6b9c1a36c","schema_version":"1.0","event_id":"sha256:cf6ec9d3d037afaf0613ccffe9d3974c9e51a586c80ead9985e143d6b9c1a36c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:BETCIZWFOX44LRHQIDNKT5CFL7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hyperbolic Phonon Polariton Electroluminescence as an Electronic Cooling Pathway","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"B. Placais, C. Voisin, E. Baudin","submitted_at":"2019-08-08T07:14:06Z","abstract_excerpt":"Engineering of cooling mechanism is of primary importance for the development of nanoelectronics. Whereas radiation cooling is rather inefficient in nowadays electronic devices, the strong anisotropy of 2D materials allows for enhanced efficiency because their hyperbolic electromagnetic dispersion near phonon resonances allows them to sustain much larger ($\\sim 10^5$) number of radiating channels. In this review, we address radiation cooling in 2D materials, specifically graphene hexagonal boron nitride (hBN) heterostructures. We present the hyperbolic dispersion of electromagnetic waves due t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02953","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/1908.02953/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":"2026-07-05T00:11:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BjWNwt6KfRn9pjZ/o8P/ZH6UlLL58fckkFvQuhXriRxNOiXfv16RbLk2ZjqtK0TnkqzXhpd/qvqDstM4usEkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T03:40:45.694750Z"},"content_sha256":"cbbe867721a809868009d3d18557b5feb339624fe1695dcaba11f0ae4f0c1094","schema_version":"1.0","event_id":"sha256:cbbe867721a809868009d3d18557b5feb339624fe1695dcaba11f0ae4f0c1094"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BETCIZWFOX44LRHQIDNKT5CFL7/bundle.json","state_url":"https://pith.science/pith/BETCIZWFOX44LRHQIDNKT5CFL7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BETCIZWFOX44LRHQIDNKT5CFL7/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":"2026-08-16T03:40:45Z","links":{"resolver":"https://pith.science/pith/BETCIZWFOX44LRHQIDNKT5CFL7","bundle":"https://pith.science/pith/BETCIZWFOX44LRHQIDNKT5CFL7/bundle.json","state":"https://pith.science/pith/BETCIZWFOX44LRHQIDNKT5CFL7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BETCIZWFOX44LRHQIDNKT5CFL7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:BETCIZWFOX44LRHQIDNKT5CFL7","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":"3b4b0606b5adc5b23981d6b8655bf2b4e6b5e8803636366a6bd0f53bc9488ecb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-08T07:14:06Z","title_canon_sha256":"bf029950499079a0a0e81423e16e795dea60fb6bd437c1fb99b91973c9e1bc0e"},"schema_version":"1.0","source":{"id":"1908.02953","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02953","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02953v1","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02953","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"pith_short_12","alias_value":"BETCIZWFOX44","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"pith_short_16","alias_value":"BETCIZWFOX44LRHQ","created_at":"2026-07-05T00:11:04Z"},{"alias_kind":"pith_short_8","alias_value":"BETCIZWF","created_at":"2026-07-05T00:11:04Z"}],"graph_snapshots":[{"event_id":"sha256:cbbe867721a809868009d3d18557b5feb339624fe1695dcaba11f0ae4f0c1094","target":"graph","created_at":"2026-07-05T00:11:04Z","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/1908.02953/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Engineering of cooling mechanism is of primary importance for the development of nanoelectronics. Whereas radiation cooling is rather inefficient in nowadays electronic devices, the strong anisotropy of 2D materials allows for enhanced efficiency because their hyperbolic electromagnetic dispersion near phonon resonances allows them to sustain much larger ($\\sim 10^5$) number of radiating channels. In this review, we address radiation cooling in 2D materials, specifically graphene hexagonal boron nitride (hBN) heterostructures. We present the hyperbolic dispersion of electromagnetic waves due t","authors_text":"B. Placais, C. Voisin, E. Baudin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-08T07:14:06Z","title":"Hyperbolic Phonon Polariton Electroluminescence as an Electronic Cooling Pathway"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02953","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:cf6ec9d3d037afaf0613ccffe9d3974c9e51a586c80ead9985e143d6b9c1a36c","target":"record","created_at":"2026-07-05T00:11:04Z","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":"3b4b0606b5adc5b23981d6b8655bf2b4e6b5e8803636366a6bd0f53bc9488ecb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-08T07:14:06Z","title_canon_sha256":"bf029950499079a0a0e81423e16e795dea60fb6bd437c1fb99b91973c9e1bc0e"},"schema_version":"1.0","source":{"id":"1908.02953","kind":"arxiv","version":1}},"canonical_sha256":"09262466c575f9c5c4f040daa9f4455fcd0f586e9b9c3d22aefb801c5288a214","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"09262466c575f9c5c4f040daa9f4455fcd0f586e9b9c3d22aefb801c5288a214","first_computed_at":"2026-07-05T00:11:04.887433Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:11:04.887433Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dWSGYWhtei4UEW/slwWgoaHyu0+bAdqN5t3rLhjAdcG+bTIKFJaqWeFMDpAgwah/pt7hiAdzl/vBmRXmeDs7CQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:11:04.887869Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.02953","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf6ec9d3d037afaf0613ccffe9d3974c9e51a586c80ead9985e143d6b9c1a36c","sha256:cbbe867721a809868009d3d18557b5feb339624fe1695dcaba11f0ae4f0c1094"],"state_sha256":"376b5f7862e9a3e75a9cc09b90f220eda954a49979f190030b71331406d3ba8b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PuVH2EYB5nN6Gk07FiLZmm78bP+bQ5kkOMCNJhSt9/lYaGFc4v7yhCDWvDtdMNu7DjZvla+bRCTtZ21qnTFxCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T03:40:45.698128Z","bundle_sha256":"96489a3226fbfa778f2e37cea3d46c3ac011efcff3ff9a4b734866641619a6a7"}}