{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZPGYMTAU5M2FBSWAIDYODUKCG2","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":"1be2e359f4bab920aa9056586d60124ce745dba1ece31153c2e14e27f9967423","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-04-25T13:39:48Z","title_canon_sha256":"c43fbeceb0b535520f3fdabb38ef2f7105088cf220ecc86fa3c1d4ca8adb612a"},"schema_version":"1.0","source":{"id":"1604.07251","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.07251","created_at":"2026-05-18T01:11:48Z"},{"alias_kind":"arxiv_version","alias_value":"1604.07251v2","created_at":"2026-05-18T01:11:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.07251","created_at":"2026-05-18T01:11:48Z"},{"alias_kind":"pith_short_12","alias_value":"ZPGYMTAU5M2F","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZPGYMTAU5M2FBSWA","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZPGYMTAU","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:3a803ab070c3ae03937d7411a8383bf6f5a063a1f122fb9b2697c6c984595d29","target":"graph","created_at":"2026-05-18T01:11:48Z","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":"We use scanning near-field optical microscopy to study the response of hexagonal boron nitride nanocones at infrared frequencies, where this material behaves as a hyperbolic medium. The obtained images are dominated by a series of hot rings that occur on the sloped sidewalls of the nanocones. The ring positions depend on the incident laser frequency and the nanocone shape. Both dependences are consistent with directional propagation of hyperbolic phonon polariton rays that are launched at the edges and zigzag through the interior of the nanocones, sustaining multiple internal reflections off t","authors_text":"Alexander J Giles, Andrey V Kretinin, Chase T Ellis, Dimitri N Basov, Joseph G Tischler, Joshua D Caldwell, Kenji Watanabe, Kostya S Novoselov, Michael M Fogler, Orest J Glembocki, Siyuan Dai, Takashi Taniguchi, Zhiyuan Sun","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-04-25T13:39:48Z","title":"Imaging of anomalous internal reflections of hyperbolic phonon-polaritons in hexagonal boron nitride"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.07251","kind":"arxiv","version":2},"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:bb03e532d7b99a41b9d6f395dcdcd7fe5746afac1ce928991302ec7d57cb2629","target":"record","created_at":"2026-05-18T01:11:48Z","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":"1be2e359f4bab920aa9056586d60124ce745dba1ece31153c2e14e27f9967423","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-04-25T13:39:48Z","title_canon_sha256":"c43fbeceb0b535520f3fdabb38ef2f7105088cf220ecc86fa3c1d4ca8adb612a"},"schema_version":"1.0","source":{"id":"1604.07251","kind":"arxiv","version":2}},"canonical_sha256":"cbcd864c14eb3450cac040f0e1d14236a9aaad2072729c0109e4ac3da646464b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cbcd864c14eb3450cac040f0e1d14236a9aaad2072729c0109e4ac3da646464b","first_computed_at":"2026-05-18T01:11:48.055562Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:48.055562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VaOYOtl+vIfULsKEfmMbmydB9450IQizMa6AJq/dpKoCUNliShw07ru0uE44AXl5POW2CLA4xFzg3wPRa2YVBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:48.056014Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.07251","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb03e532d7b99a41b9d6f395dcdcd7fe5746afac1ce928991302ec7d57cb2629","sha256:3a803ab070c3ae03937d7411a8383bf6f5a063a1f122fb9b2697c6c984595d29"],"state_sha256":"e26234652d33948b793cdf484e9b6f831f8c7ea19211a08a37e0220cc0652ddd"}