{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:UG32MS6YYXQ2NP4EGXP23VCNCN","short_pith_number":"pith:UG32MS6Y","canonical_record":{"source":{"id":"1203.2687","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-03-13T01:22:52Z","cross_cats_sorted":[],"title_canon_sha256":"dea47fcecf652e3b5a4d3eabe56f2da46811fb81e9e9011e5a8dd50877617563","abstract_canon_sha256":"58a1327848eafff39ebc52b15d0d1cadfbb548b713f3b4fe52d66acc5c47eff6"},"schema_version":"1.0"},"canonical_sha256":"a1b7a64bd8c5e1a6bf8435dfadd44d137ae7e60e2671bfcc34f5d0f6971d3a5b","source":{"kind":"arxiv","id":"1203.2687","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.2687","created_at":"2026-05-18T01:58:09Z"},{"alias_kind":"arxiv_version","alias_value":"1203.2687v2","created_at":"2026-05-18T01:58:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.2687","created_at":"2026-05-18T01:58:09Z"},{"alias_kind":"pith_short_12","alias_value":"UG32MS6YYXQ2","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"UG32MS6YYXQ2NP4E","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"UG32MS6Y","created_at":"2026-05-18T12:27:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:UG32MS6YYXQ2NP4EGXP23VCNCN","target":"record","payload":{"canonical_record":{"source":{"id":"1203.2687","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-03-13T01:22:52Z","cross_cats_sorted":[],"title_canon_sha256":"dea47fcecf652e3b5a4d3eabe56f2da46811fb81e9e9011e5a8dd50877617563","abstract_canon_sha256":"58a1327848eafff39ebc52b15d0d1cadfbb548b713f3b4fe52d66acc5c47eff6"},"schema_version":"1.0"},"canonical_sha256":"a1b7a64bd8c5e1a6bf8435dfadd44d137ae7e60e2671bfcc34f5d0f6971d3a5b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:09.583957Z","signature_b64":"q1gGUuk7rhCPPjbPg2M3GQfb3Xr11+w6oHb4cnC9DkMNhjBbGZAMfxWpPdEWziyACSvL2dh9dqjjhVZGh7kTCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1b7a64bd8c5e1a6bf8435dfadd44d137ae7e60e2671bfcc34f5d0f6971d3a5b","last_reissued_at":"2026-05-18T01:58:09.583378Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:09.583378Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.2687","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":"2026-05-18T01:58:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eQSP9FV42vZ2UmYR4f2T3W3qAKUEj1beSQexiT4ugEbYviMFG9/jZEPcjaiLYUJM7LB0ESeYYzuUTHzdGNNZDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T17:37:15.641113Z"},"content_sha256":"d5f361ff65470926935bb355df3b31f6125d89c88b8682a224039117bd261c80","schema_version":"1.0","event_id":"sha256:d5f361ff65470926935bb355df3b31f6125d89c88b8682a224039117bd261c80"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:UG32MS6YYXQ2NP4EGXP23VCNCN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low energy electrodynamics of the Kondo-lattice antiferromagnet CeCu$_2$Ge$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A. V. Stier, G. Boss\\'e, J. Eckstein, LiDong Pan, L. S. Bilbro, N. P. Armitage, R. Vald\\'es Aguilar, Wei Liu, Y. Li","submitted_at":"2012-03-13T01:22:52Z","abstract_excerpt":"We present time-domain THz spectroscopy data of a thin film of the Kondo-lattice antiferromagnet CeCu$_2$Ge$_2$. The low frequency complex conductivity has been obtained down to temperatures below the onset of magnetic order. At low temperatures a narrow Drude-like peak forms, which is similar to ones found in other heavy fermion compounds that do not exhibit magnetic order. Using this data in conjunction with DC resistivity measurements, we obtain the frequency dependence of the scattering rate and effective mass through an extended Drude model analysis. The zero frequency limit of this analy"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.2687","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":"2026-05-18T01:58:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G63zvwC7GWY7qQCVkY6ROsM2lIZH9D6CrZV7RkAIinASI72za+61YS25zbDJvFnVme2xDUXZo0t510i2f3ObDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T17:37:15.641827Z"},"content_sha256":"1cd09c4aed490017b7bb84540d37bcd88f108204b5c620cd3b58139e8ded69cd","schema_version":"1.0","event_id":"sha256:1cd09c4aed490017b7bb84540d37bcd88f108204b5c620cd3b58139e8ded69cd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UG32MS6YYXQ2NP4EGXP23VCNCN/bundle.json","state_url":"https://pith.science/pith/UG32MS6YYXQ2NP4EGXP23VCNCN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UG32MS6YYXQ2NP4EGXP23VCNCN/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":"2026-05-18T17:37:15Z","links":{"resolver":"https://pith.science/pith/UG32MS6YYXQ2NP4EGXP23VCNCN","bundle":"https://pith.science/pith/UG32MS6YYXQ2NP4EGXP23VCNCN/bundle.json","state":"https://pith.science/pith/UG32MS6YYXQ2NP4EGXP23VCNCN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UG32MS6YYXQ2NP4EGXP23VCNCN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:UG32MS6YYXQ2NP4EGXP23VCNCN","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":"58a1327848eafff39ebc52b15d0d1cadfbb548b713f3b4fe52d66acc5c47eff6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-03-13T01:22:52Z","title_canon_sha256":"dea47fcecf652e3b5a4d3eabe56f2da46811fb81e9e9011e5a8dd50877617563"},"schema_version":"1.0","source":{"id":"1203.2687","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.2687","created_at":"2026-05-18T01:58:09Z"},{"alias_kind":"arxiv_version","alias_value":"1203.2687v2","created_at":"2026-05-18T01:58:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.2687","created_at":"2026-05-18T01:58:09Z"},{"alias_kind":"pith_short_12","alias_value":"UG32MS6YYXQ2","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"UG32MS6YYXQ2NP4E","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"UG32MS6Y","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:1cd09c4aed490017b7bb84540d37bcd88f108204b5c620cd3b58139e8ded69cd","target":"graph","created_at":"2026-05-18T01:58:09Z","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 present time-domain THz spectroscopy data of a thin film of the Kondo-lattice antiferromagnet CeCu$_2$Ge$_2$. The low frequency complex conductivity has been obtained down to temperatures below the onset of magnetic order. At low temperatures a narrow Drude-like peak forms, which is similar to ones found in other heavy fermion compounds that do not exhibit magnetic order. Using this data in conjunction with DC resistivity measurements, we obtain the frequency dependence of the scattering rate and effective mass through an extended Drude model analysis. The zero frequency limit of this analy","authors_text":"A. V. Stier, G. Boss\\'e, J. Eckstein, LiDong Pan, L. S. Bilbro, N. P. Armitage, R. Vald\\'es Aguilar, Wei Liu, Y. Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-03-13T01:22:52Z","title":"Low energy electrodynamics of the Kondo-lattice antiferromagnet CeCu$_2$Ge$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.2687","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:d5f361ff65470926935bb355df3b31f6125d89c88b8682a224039117bd261c80","target":"record","created_at":"2026-05-18T01:58:09Z","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":"58a1327848eafff39ebc52b15d0d1cadfbb548b713f3b4fe52d66acc5c47eff6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-03-13T01:22:52Z","title_canon_sha256":"dea47fcecf652e3b5a4d3eabe56f2da46811fb81e9e9011e5a8dd50877617563"},"schema_version":"1.0","source":{"id":"1203.2687","kind":"arxiv","version":2}},"canonical_sha256":"a1b7a64bd8c5e1a6bf8435dfadd44d137ae7e60e2671bfcc34f5d0f6971d3a5b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1b7a64bd8c5e1a6bf8435dfadd44d137ae7e60e2671bfcc34f5d0f6971d3a5b","first_computed_at":"2026-05-18T01:58:09.583378Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:09.583378Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q1gGUuk7rhCPPjbPg2M3GQfb3Xr11+w6oHb4cnC9DkMNhjBbGZAMfxWpPdEWziyACSvL2dh9dqjjhVZGh7kTCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:09.583957Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.2687","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d5f361ff65470926935bb355df3b31f6125d89c88b8682a224039117bd261c80","sha256:1cd09c4aed490017b7bb84540d37bcd88f108204b5c620cd3b58139e8ded69cd"],"state_sha256":"791d50416e347cb09e7bbad5913d07b02225547c0769dcd367cb85f5e544ac08"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lF3c90N94brT14XLllNOH5AD4EHwGVjEqms4zA//AFvF1cZXW+7AVD9LGYOK5m6xjOON0APhrMitxYy9/pBnAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T17:37:15.644002Z","bundle_sha256":"c50c0326051f531488e260032d5584d0d876c92c31935473873983f6a225d836"}}