{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:ACU4IJVQ5TIRLPCXBQS45J6SFD","short_pith_number":"pith:ACU4IJVQ","canonical_record":{"source":{"id":"1307.1087","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-07-03T17:35:27Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"050e36367a2610601ce23bcc77919141317cb97a0f949ce346be7aac1f6a1e8a","abstract_canon_sha256":"e706ab203fd9539fe28de392b0900766e191db446182c26505b7b9c5f48f6c46"},"schema_version":"1.0"},"canonical_sha256":"00a9c426b0ecd115bc570c25cea7d228eaac4003ea4d351d6f77ac236bcb7ced","source":{"kind":"arxiv","id":"1307.1087","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1087","created_at":"2026-05-18T03:12:59Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1087v2","created_at":"2026-05-18T03:12:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1087","created_at":"2026-05-18T03:12:59Z"},{"alias_kind":"pith_short_12","alias_value":"ACU4IJVQ5TIR","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"ACU4IJVQ5TIRLPCX","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"ACU4IJVQ","created_at":"2026-05-18T12:27:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:ACU4IJVQ5TIRLPCXBQS45J6SFD","target":"record","payload":{"canonical_record":{"source":{"id":"1307.1087","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-07-03T17:35:27Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"050e36367a2610601ce23bcc77919141317cb97a0f949ce346be7aac1f6a1e8a","abstract_canon_sha256":"e706ab203fd9539fe28de392b0900766e191db446182c26505b7b9c5f48f6c46"},"schema_version":"1.0"},"canonical_sha256":"00a9c426b0ecd115bc570c25cea7d228eaac4003ea4d351d6f77ac236bcb7ced","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:12:59.707182Z","signature_b64":"aTQZiapTwmXYOJAGgn0PtwqdLbvKE5Yhzjftfusf2RthCt3yWd17+2CmgUKQAzhSNziEeB981Pg3tlNaINR1DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"00a9c426b0ecd115bc570c25cea7d228eaac4003ea4d351d6f77ac236bcb7ced","last_reissued_at":"2026-05-18T03:12:59.706368Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:12:59.706368Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.1087","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:12:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pIiT6y2MqIMIsojjNR55lGsq2Gbjg7Rp7BqF415EqRpB7uD9UAbHjXQhsiEViN0znZjNVrhm//+Ov5JOuFa3Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T07:18:27.081370Z"},"content_sha256":"d3165ad4dc3bea433369d062f6a54e6959291c8d965b03652c71bcc19cfd3aa7","schema_version":"1.0","event_id":"sha256:d3165ad4dc3bea433369d062f6a54e6959291c8d965b03652c71bcc19cfd3aa7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:ACU4IJVQ5TIRLPCXBQS45J6SFD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dielectric screening and plasmons in AA-stacked bilayer graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Luis Brey, Rafael Roldan","submitted_at":"2013-07-03T17:35:27Z","abstract_excerpt":"The screening properties and collective excitations (plasmons) in AA-stacked bilayer graphene are studied within the random phase approximation (RPA). Whereas long lived plasmons in single layer graphene and in AB-stacked bilayer graphene can exist only in doped samples, we find that coherent plasmons can disperse in AA-stacked bilayer graphene {\\it even in the absence of doping}. Moreover, we show that the characteristic low energy dispersion relation is unaffected by changes in the number of carriers, unless the chemical potential of the doped sample exceeds the inter-layer hopping energy. W"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1087","kind":"arxiv","version":2},"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":"2026-05-18T03:12:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zRa8JdUJc2174FDbObf5LoDP/X2qQwVgHIIOCKmbmD++T9nYxA2WPKW1Ehh5MsMrkhqB2pWaSzRQQEltcG+QBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T07:18:27.081713Z"},"content_sha256":"e65b093038e8a8aae0b4ad6abfbfb8d87498090b59886176cc393a8cc3b821ce","schema_version":"1.0","event_id":"sha256:e65b093038e8a8aae0b4ad6abfbfb8d87498090b59886176cc393a8cc3b821ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ACU4IJVQ5TIRLPCXBQS45J6SFD/bundle.json","state_url":"https://pith.science/pith/ACU4IJVQ5TIRLPCXBQS45J6SFD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ACU4IJVQ5TIRLPCXBQS45J6SFD/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":"2026-06-28T07:18:27Z","links":{"resolver":"https://pith.science/pith/ACU4IJVQ5TIRLPCXBQS45J6SFD","bundle":"https://pith.science/pith/ACU4IJVQ5TIRLPCXBQS45J6SFD/bundle.json","state":"https://pith.science/pith/ACU4IJVQ5TIRLPCXBQS45J6SFD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ACU4IJVQ5TIRLPCXBQS45J6SFD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ACU4IJVQ5TIRLPCXBQS45J6SFD","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":"e706ab203fd9539fe28de392b0900766e191db446182c26505b7b9c5f48f6c46","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-07-03T17:35:27Z","title_canon_sha256":"050e36367a2610601ce23bcc77919141317cb97a0f949ce346be7aac1f6a1e8a"},"schema_version":"1.0","source":{"id":"1307.1087","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.1087","created_at":"2026-05-18T03:12:59Z"},{"alias_kind":"arxiv_version","alias_value":"1307.1087v2","created_at":"2026-05-18T03:12:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.1087","created_at":"2026-05-18T03:12:59Z"},{"alias_kind":"pith_short_12","alias_value":"ACU4IJVQ5TIR","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"ACU4IJVQ5TIRLPCX","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"ACU4IJVQ","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:e65b093038e8a8aae0b4ad6abfbfb8d87498090b59886176cc393a8cc3b821ce","target":"graph","created_at":"2026-05-18T03:12:59Z","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 screening properties and collective excitations (plasmons) in AA-stacked bilayer graphene are studied within the random phase approximation (RPA). Whereas long lived plasmons in single layer graphene and in AB-stacked bilayer graphene can exist only in doped samples, we find that coherent plasmons can disperse in AA-stacked bilayer graphene {\\it even in the absence of doping}. Moreover, we show that the characteristic low energy dispersion relation is unaffected by changes in the number of carriers, unless the chemical potential of the doped sample exceeds the inter-layer hopping energy. W","authors_text":"Luis Brey, Rafael Roldan","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-07-03T17:35:27Z","title":"Dielectric screening and plasmons in AA-stacked bilayer graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.1087","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:d3165ad4dc3bea433369d062f6a54e6959291c8d965b03652c71bcc19cfd3aa7","target":"record","created_at":"2026-05-18T03:12:59Z","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":"e706ab203fd9539fe28de392b0900766e191db446182c26505b7b9c5f48f6c46","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-07-03T17:35:27Z","title_canon_sha256":"050e36367a2610601ce23bcc77919141317cb97a0f949ce346be7aac1f6a1e8a"},"schema_version":"1.0","source":{"id":"1307.1087","kind":"arxiv","version":2}},"canonical_sha256":"00a9c426b0ecd115bc570c25cea7d228eaac4003ea4d351d6f77ac236bcb7ced","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"00a9c426b0ecd115bc570c25cea7d228eaac4003ea4d351d6f77ac236bcb7ced","first_computed_at":"2026-05-18T03:12:59.706368Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:12:59.706368Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aTQZiapTwmXYOJAGgn0PtwqdLbvKE5Yhzjftfusf2RthCt3yWd17+2CmgUKQAzhSNziEeB981Pg3tlNaINR1DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:12:59.707182Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.1087","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d3165ad4dc3bea433369d062f6a54e6959291c8d965b03652c71bcc19cfd3aa7","sha256:e65b093038e8a8aae0b4ad6abfbfb8d87498090b59886176cc393a8cc3b821ce"],"state_sha256":"a27dd0e040789767c0b3405607202e4059512a57c72e611b818562d9fc061174"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oZOC3YwZVmNf2DFW8uOAR40HJVzZm2UjJU77n8BJUcTHJk2cdV9aVSTzD7QR8wkojVMs1VTTo+TwSObH1l+wDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T07:18:27.083554Z","bundle_sha256":"43f7ca91d7fa169cb4bf71aa9fa73614a795b810f6061d962c440dbafad7ea5f"}}