{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:QIVEPNISFBUXN4HYPZ67NOOX2O","short_pith_number":"pith:QIVEPNIS","canonical_record":{"source":{"id":"2010.14378","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-10-27T15:43:23Z","cross_cats_sorted":[],"title_canon_sha256":"baa64cee02562043744a67ed722f38fcf28fb8d80d9139c006512adaeaf4d533","abstract_canon_sha256":"ec004913b34593c5fe550574f88ae5788fd3f9f220f9c4c4a5f184f65e4fdbff"},"schema_version":"1.0"},"canonical_sha256":"822a47b512286976f0f87e7df6b9d7d3bd7b66c5c64b4de94504544835068008","source":{"kind":"arxiv","id":"2010.14378","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.14378","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"arxiv_version","alias_value":"2010.14378v1","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.14378","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"pith_short_12","alias_value":"QIVEPNISFBUX","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"pith_short_16","alias_value":"QIVEPNISFBUXN4HY","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"pith_short_8","alias_value":"QIVEPNIS","created_at":"2026-07-05T02:56:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:QIVEPNISFBUXN4HYPZ67NOOX2O","target":"record","payload":{"canonical_record":{"source":{"id":"2010.14378","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-10-27T15:43:23Z","cross_cats_sorted":[],"title_canon_sha256":"baa64cee02562043744a67ed722f38fcf28fb8d80d9139c006512adaeaf4d533","abstract_canon_sha256":"ec004913b34593c5fe550574f88ae5788fd3f9f220f9c4c4a5f184f65e4fdbff"},"schema_version":"1.0"},"canonical_sha256":"822a47b512286976f0f87e7df6b9d7d3bd7b66c5c64b4de94504544835068008","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:56:37.290071Z","signature_b64":"o3bvMYmCuNWG+1Bi5ZvVsmtorWXhRWblR4uSxzSfmjJjlwiKy8GVs5BlLNmUl2zPbWmkyvdiQ+kBjwhBoxftDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"822a47b512286976f0f87e7df6b9d7d3bd7b66c5c64b4de94504544835068008","last_reissued_at":"2026-07-05T02:56:37.289602Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:56:37.289602Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2010.14378","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":"2026-07-05T02:56:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BbeS0orcQTWVhWhgw76i6p1IJeYFe0oiFrU72pWFI7lePwRPioZhRaHdgKzga4vzNfARnyWgxgIFjToUSYeLBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T13:01:14.883714Z"},"content_sha256":"2ccc615424b7267dbb485a35f1dc8d9de8e008cdbc771209856fb73fac22b9a0","schema_version":"1.0","event_id":"sha256:2ccc615424b7267dbb485a35f1dc8d9de8e008cdbc771209856fb73fac22b9a0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:QIVEPNISFBUXN4HYPZ67NOOX2O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Simultaneous excitation of phonons at the center and boundaries of Brillouin zones with high energy electron beams","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Kartik Venkatraman, Peter A. Crozier","submitted_at":"2020-10-27T15:43:23Z","abstract_excerpt":"High energy electron beams can now be routinely focused to 1-2 {\\AA} and offer the ability to obtain vibrational information from materials using monochromated electron energy-loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM). Here it is shown that long and short wavelength phonons can be probed simultaneously with on-axis vibrational STEM EELS. The advantage of using focused electron beams is that the short wavelength phonons are probed via impact scattering while the long-wavelength modes are probed via dipole scattering. The localized character of the short-wave"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.14378","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/2010.14378/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":"2026-07-05T02:56:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+UlelHIWjKTeHd6PX3K9B5FbMQCzdwf3Ny4/BoJsnQdumfmxoJmjMbbpujGkIgg9HxEust2eSQF3EaamOffsDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T13:01:14.884357Z"},"content_sha256":"abf21d935d953a82d65aa4877a1d9d220b0a794a0c5536d07f4bdc4dffc76830","schema_version":"1.0","event_id":"sha256:abf21d935d953a82d65aa4877a1d9d220b0a794a0c5536d07f4bdc4dffc76830"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QIVEPNISFBUXN4HYPZ67NOOX2O/bundle.json","state_url":"https://pith.science/pith/QIVEPNISFBUXN4HYPZ67NOOX2O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QIVEPNISFBUXN4HYPZ67NOOX2O/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":"2026-08-21T13:01:14Z","links":{"resolver":"https://pith.science/pith/QIVEPNISFBUXN4HYPZ67NOOX2O","bundle":"https://pith.science/pith/QIVEPNISFBUXN4HYPZ67NOOX2O/bundle.json","state":"https://pith.science/pith/QIVEPNISFBUXN4HYPZ67NOOX2O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QIVEPNISFBUXN4HYPZ67NOOX2O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:QIVEPNISFBUXN4HYPZ67NOOX2O","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":"ec004913b34593c5fe550574f88ae5788fd3f9f220f9c4c4a5f184f65e4fdbff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-10-27T15:43:23Z","title_canon_sha256":"baa64cee02562043744a67ed722f38fcf28fb8d80d9139c006512adaeaf4d533"},"schema_version":"1.0","source":{"id":"2010.14378","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.14378","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"arxiv_version","alias_value":"2010.14378v1","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.14378","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"pith_short_12","alias_value":"QIVEPNISFBUX","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"pith_short_16","alias_value":"QIVEPNISFBUXN4HY","created_at":"2026-07-05T02:56:37Z"},{"alias_kind":"pith_short_8","alias_value":"QIVEPNIS","created_at":"2026-07-05T02:56:37Z"}],"graph_snapshots":[{"event_id":"sha256:abf21d935d953a82d65aa4877a1d9d220b0a794a0c5536d07f4bdc4dffc76830","target":"graph","created_at":"2026-07-05T02:56:37Z","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/2010.14378/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"High energy electron beams can now be routinely focused to 1-2 {\\AA} and offer the ability to obtain vibrational information from materials using monochromated electron energy-loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM). Here it is shown that long and short wavelength phonons can be probed simultaneously with on-axis vibrational STEM EELS. The advantage of using focused electron beams is that the short wavelength phonons are probed via impact scattering while the long-wavelength modes are probed via dipole scattering. The localized character of the short-wave","authors_text":"Kartik Venkatraman, Peter A. Crozier","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-10-27T15:43:23Z","title":"Simultaneous excitation of phonons at the center and boundaries of Brillouin zones with high energy electron beams"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.14378","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":"sha256:2ccc615424b7267dbb485a35f1dc8d9de8e008cdbc771209856fb73fac22b9a0","target":"record","created_at":"2026-07-05T02:56:37Z","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":"ec004913b34593c5fe550574f88ae5788fd3f9f220f9c4c4a5f184f65e4fdbff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-10-27T15:43:23Z","title_canon_sha256":"baa64cee02562043744a67ed722f38fcf28fb8d80d9139c006512adaeaf4d533"},"schema_version":"1.0","source":{"id":"2010.14378","kind":"arxiv","version":1}},"canonical_sha256":"822a47b512286976f0f87e7df6b9d7d3bd7b66c5c64b4de94504544835068008","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"822a47b512286976f0f87e7df6b9d7d3bd7b66c5c64b4de94504544835068008","first_computed_at":"2026-07-05T02:56:37.289602Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:56:37.289602Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o3bvMYmCuNWG+1Bi5ZvVsmtorWXhRWblR4uSxzSfmjJjlwiKy8GVs5BlLNmUl2zPbWmkyvdiQ+kBjwhBoxftDw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:56:37.290071Z","signed_message":"canonical_sha256_bytes"},"source_id":"2010.14378","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ccc615424b7267dbb485a35f1dc8d9de8e008cdbc771209856fb73fac22b9a0","sha256:abf21d935d953a82d65aa4877a1d9d220b0a794a0c5536d07f4bdc4dffc76830"],"state_sha256":"bca88fb9062aff98c1caf38726fd1e28e02f512507a51a1ad240906eca3fa4f6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4TUbfXNo1LH948f0iQ/6T5s8goghOVyMHCLz6b7JGMEtONXCFReFOsuVHuCM5fs0onRFp3+ARA2gdiu+tN61Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T13:01:14.894768Z","bundle_sha256":"286c79bebbcfb8d8606fbe969ed78ad0db0a9767cf7897c7fe4e98810a07a3f0"}}