{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:DOPD5CE7Z2AY4TTOHGS3MW2EIY","short_pith_number":"pith:DOPD5CE7","canonical_record":{"source":{"id":"1412.4581","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-12-15T13:38:21Z","cross_cats_sorted":[],"title_canon_sha256":"916d0cba1b0ae30a6c3d46a041ffc553c34c4b367d499d9895b83e7018a863cf","abstract_canon_sha256":"e52653e20c0ca2186c77e5f20ab7bbb92bd782cde58e6e35173752e4081e0208"},"schema_version":"1.0"},"canonical_sha256":"1b9e3e889fce818e4e6e39a5b65b4446201e78d8015951f6e653707bac2575b6","source":{"kind":"arxiv","id":"1412.4581","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4581","created_at":"2026-05-18T02:31:18Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4581v1","created_at":"2026-05-18T02:31:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4581","created_at":"2026-05-18T02:31:18Z"},{"alias_kind":"pith_short_12","alias_value":"DOPD5CE7Z2AY","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DOPD5CE7Z2AY4TTO","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DOPD5CE7","created_at":"2026-05-18T12:28:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:DOPD5CE7Z2AY4TTOHGS3MW2EIY","target":"record","payload":{"canonical_record":{"source":{"id":"1412.4581","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-12-15T13:38:21Z","cross_cats_sorted":[],"title_canon_sha256":"916d0cba1b0ae30a6c3d46a041ffc553c34c4b367d499d9895b83e7018a863cf","abstract_canon_sha256":"e52653e20c0ca2186c77e5f20ab7bbb92bd782cde58e6e35173752e4081e0208"},"schema_version":"1.0"},"canonical_sha256":"1b9e3e889fce818e4e6e39a5b65b4446201e78d8015951f6e653707bac2575b6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:31:18.760721Z","signature_b64":"I1cPIdrYdcLyYNtLy7BI8z0OHccIbD2g6QgxjWhYXx2sqpPUpXA5jzfHckKMDGl9QmnMjS5mZwYY2g814oiYBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1b9e3e889fce818e4e6e39a5b65b4446201e78d8015951f6e653707bac2575b6","last_reissued_at":"2026-05-18T02:31:18.760178Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:31:18.760178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.4581","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":"2026-05-18T02:31:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kBqdgLs+aheTbB/dnFA6FIoUfNxrZzSs0zZ+fpKSmaZMdU3g61YyvfASeEX4jxzrkbiWbJwSGWTGoAnQ25LmDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T13:49:54.679532Z"},"content_sha256":"e8371de631c9c045df155683c155a3ccfff959961982d513b2f668e5ca719826","schema_version":"1.0","event_id":"sha256:e8371de631c9c045df155683c155a3ccfff959961982d513b2f668e5ca719826"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:DOPD5CE7Z2AY4TTOHGS3MW2EIY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-Energy Excitations in the Quantum Spin-Liquid $\\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_{3}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A. Pustogow, B. Gorshunov, E.Zhukova, J. A. Schlueter, M. Dressel, M. Pinteri\\'c, S. Tomi\\'c","submitted_at":"2014-12-15T13:38:21Z","abstract_excerpt":"The electrodynamic response of the organic spin-liquid candidate $\\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_3$ has been measured in an extremely wide energy range ($10^{-13}$ to 2 eV) as a function of temperature (5 to 300 K). Below the Mott gap, excitations from the un-gapped spinon continuum cause a considerable contribution to the infrared conductivity, as suggested by the U(1) gauge theory. At THz frequencies we can identify a power-law behavior $\\sigma(\\omega) \\propto \\omega^{\\beta}$ with two distinct exponents $\\beta$ that change from 0.9 to 1.3 at low temperatures. The corresponding crossover s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4581","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":""},"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":"2026-05-18T02:31:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iViVkSOFtuOyLYBKnTK35yBxo0RnKYKJYIOkx6rZG/TtDBFA+kwI2/jdPH3AmUS4PI55gNc1ogy4BJxTCfp+Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T13:49:54.679882Z"},"content_sha256":"22cc459e44432d62f0aefb2fac41b99509195564d270f19ec45468fd83ff5dad","schema_version":"1.0","event_id":"sha256:22cc459e44432d62f0aefb2fac41b99509195564d270f19ec45468fd83ff5dad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DOPD5CE7Z2AY4TTOHGS3MW2EIY/bundle.json","state_url":"https://pith.science/pith/DOPD5CE7Z2AY4TTOHGS3MW2EIY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DOPD5CE7Z2AY4TTOHGS3MW2EIY/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":"2026-06-22T13:49:54Z","links":{"resolver":"https://pith.science/pith/DOPD5CE7Z2AY4TTOHGS3MW2EIY","bundle":"https://pith.science/pith/DOPD5CE7Z2AY4TTOHGS3MW2EIY/bundle.json","state":"https://pith.science/pith/DOPD5CE7Z2AY4TTOHGS3MW2EIY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DOPD5CE7Z2AY4TTOHGS3MW2EIY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:DOPD5CE7Z2AY4TTOHGS3MW2EIY","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":"e52653e20c0ca2186c77e5f20ab7bbb92bd782cde58e6e35173752e4081e0208","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-12-15T13:38:21Z","title_canon_sha256":"916d0cba1b0ae30a6c3d46a041ffc553c34c4b367d499d9895b83e7018a863cf"},"schema_version":"1.0","source":{"id":"1412.4581","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4581","created_at":"2026-05-18T02:31:18Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4581v1","created_at":"2026-05-18T02:31:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4581","created_at":"2026-05-18T02:31:18Z"},{"alias_kind":"pith_short_12","alias_value":"DOPD5CE7Z2AY","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DOPD5CE7Z2AY4TTO","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DOPD5CE7","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:22cc459e44432d62f0aefb2fac41b99509195564d270f19ec45468fd83ff5dad","target":"graph","created_at":"2026-05-18T02:31:18Z","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 electrodynamic response of the organic spin-liquid candidate $\\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_3$ has been measured in an extremely wide energy range ($10^{-13}$ to 2 eV) as a function of temperature (5 to 300 K). Below the Mott gap, excitations from the un-gapped spinon continuum cause a considerable contribution to the infrared conductivity, as suggested by the U(1) gauge theory. At THz frequencies we can identify a power-law behavior $\\sigma(\\omega) \\propto \\omega^{\\beta}$ with two distinct exponents $\\beta$ that change from 0.9 to 1.3 at low temperatures. The corresponding crossover s","authors_text":"A. Pustogow, B. Gorshunov, E.Zhukova, J. A. Schlueter, M. Dressel, M. Pinteri\\'c, S. Tomi\\'c","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-12-15T13:38:21Z","title":"Low-Energy Excitations in the Quantum Spin-Liquid $\\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_{3}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4581","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:e8371de631c9c045df155683c155a3ccfff959961982d513b2f668e5ca719826","target":"record","created_at":"2026-05-18T02:31:18Z","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":"e52653e20c0ca2186c77e5f20ab7bbb92bd782cde58e6e35173752e4081e0208","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-12-15T13:38:21Z","title_canon_sha256":"916d0cba1b0ae30a6c3d46a041ffc553c34c4b367d499d9895b83e7018a863cf"},"schema_version":"1.0","source":{"id":"1412.4581","kind":"arxiv","version":1}},"canonical_sha256":"1b9e3e889fce818e4e6e39a5b65b4446201e78d8015951f6e653707bac2575b6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b9e3e889fce818e4e6e39a5b65b4446201e78d8015951f6e653707bac2575b6","first_computed_at":"2026-05-18T02:31:18.760178Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:31:18.760178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I1cPIdrYdcLyYNtLy7BI8z0OHccIbD2g6QgxjWhYXx2sqpPUpXA5jzfHckKMDGl9QmnMjS5mZwYY2g814oiYBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:31:18.760721Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.4581","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8371de631c9c045df155683c155a3ccfff959961982d513b2f668e5ca719826","sha256:22cc459e44432d62f0aefb2fac41b99509195564d270f19ec45468fd83ff5dad"],"state_sha256":"0f667b503906d614fb2ed2e0af8f4806374f44b49f135f0afcd35a578ee0e3f1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QwSGWJxAnx0VhAYlM9c2IIPM+sdcbzFCQLYwhijEYqNFQa1ztjdMLgsaicvzFDO8tNT0swMYy95qCExVswVuCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-22T13:49:54.681925Z","bundle_sha256":"5f8dc0bfee17cea148e10d270ee7c4b1d481283e06c0bc5dc20dabbbd93f0fa2"}}