{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:IPKZDZYBV43PHRSBSKUX7TVFOQ","short_pith_number":"pith:IPKZDZYB","canonical_record":{"source":{"id":"1509.03126","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-10T12:40:16Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"37e563888beb5ca1f38e1385aab5d04d71ebc206974ecc914bb6604c4139e712","abstract_canon_sha256":"b6397e4a7bffa50069f399036ca551c8f0e05fa1c4a578b2e28303e122abc642"},"schema_version":"1.0"},"canonical_sha256":"43d591e701af36f3c64192a97fcea5741d1fa1322cc8a106d9ba899e512d613a","source":{"kind":"arxiv","id":"1509.03126","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03126","created_at":"2026-05-18T01:26:57Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03126v2","created_at":"2026-05-18T01:26:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03126","created_at":"2026-05-18T01:26:57Z"},{"alias_kind":"pith_short_12","alias_value":"IPKZDZYBV43P","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IPKZDZYBV43PHRSB","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IPKZDZYB","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:IPKZDZYBV43PHRSBSKUX7TVFOQ","target":"record","payload":{"canonical_record":{"source":{"id":"1509.03126","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-10T12:40:16Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"37e563888beb5ca1f38e1385aab5d04d71ebc206974ecc914bb6604c4139e712","abstract_canon_sha256":"b6397e4a7bffa50069f399036ca551c8f0e05fa1c4a578b2e28303e122abc642"},"schema_version":"1.0"},"canonical_sha256":"43d591e701af36f3c64192a97fcea5741d1fa1322cc8a106d9ba899e512d613a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:57.282368Z","signature_b64":"U3zzGPFh6i2k3QjK6FSSBkFCygx944Ks2nntkxKk4Z9IQ5HHSQwT5pY3DhoFInkPF/7bXKNqP93ddypEu1oLAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"43d591e701af36f3c64192a97fcea5741d1fa1322cc8a106d9ba899e512d613a","last_reissued_at":"2026-05-18T01:26:57.281708Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:57.281708Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.03126","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":"2026-05-18T01:26:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9022goWmRRvbyzidiQ8quABs9eNEjKli6sg4w7ZgTucu31CueLr8AFmphXBGI6Pn/lYp991YktKAIDZHMxlEDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T22:36:28.308480Z"},"content_sha256":"e039a32b7622f0ca9cd497169adf46226e54ab84fccf8cc8a3be2c5d718158ed","schema_version":"1.0","event_id":"sha256:e039a32b7622f0ca9cd497169adf46226e54ab84fccf8cc8a3be2c5d718158ed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:IPKZDZYBV43PHRSBSKUX7TVFOQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Strong Coupling Superconductivity in the Vicinity of the Structural Quantum Critical Point in (Ca$_x$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Chishiro Michioka, Kazuyoshi Yoshimura, Masaki Imai, Paul J. Saines, Swee K. Goh, Takuya Matsumoto, Wing Chi Yu, Yiu Wing Cheung","submitted_at":"2015-09-10T12:40:16Z","abstract_excerpt":"The family of the superconducting quasi-skutterudites (Ca$_x$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$ features a structural quantum critical point at $x_c=0.9$, around which a dome-shaped variation of the superconducting transition temperature $T_c$ is found. Using specific heat, we probe the normal and the superconducting states of the entire series straddling the quantum critical point. Our analysis indicates a significant lowering of the effective Debye temperature on approaching $x_c$, which we interpret as a result of phonon softening accompanying the structural instability. Furthermore, a remarkab"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03126","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":"2026-05-18T01:26:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YA2uznXPF4Nj2tBEpIkXxyeAm0m6vxCGhU+7/o6GdVe7NqZie8TNKRwaf7gP0Ng3dBaFJ+a+57du7L/dcT/sAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T22:36:28.309193Z"},"content_sha256":"3356a9ba6352f34b92fd0b549920698a778b85c12ea6b8a9430f3c8b9885156c","schema_version":"1.0","event_id":"sha256:3356a9ba6352f34b92fd0b549920698a778b85c12ea6b8a9430f3c8b9885156c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IPKZDZYBV43PHRSBSKUX7TVFOQ/bundle.json","state_url":"https://pith.science/pith/IPKZDZYBV43PHRSBSKUX7TVFOQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IPKZDZYBV43PHRSBSKUX7TVFOQ/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":"2026-05-20T22:36:28Z","links":{"resolver":"https://pith.science/pith/IPKZDZYBV43PHRSBSKUX7TVFOQ","bundle":"https://pith.science/pith/IPKZDZYBV43PHRSBSKUX7TVFOQ/bundle.json","state":"https://pith.science/pith/IPKZDZYBV43PHRSBSKUX7TVFOQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IPKZDZYBV43PHRSBSKUX7TVFOQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IPKZDZYBV43PHRSBSKUX7TVFOQ","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":"b6397e4a7bffa50069f399036ca551c8f0e05fa1c4a578b2e28303e122abc642","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-10T12:40:16Z","title_canon_sha256":"37e563888beb5ca1f38e1385aab5d04d71ebc206974ecc914bb6604c4139e712"},"schema_version":"1.0","source":{"id":"1509.03126","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03126","created_at":"2026-05-18T01:26:57Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03126v2","created_at":"2026-05-18T01:26:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03126","created_at":"2026-05-18T01:26:57Z"},{"alias_kind":"pith_short_12","alias_value":"IPKZDZYBV43P","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IPKZDZYBV43PHRSB","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IPKZDZYB","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:3356a9ba6352f34b92fd0b549920698a778b85c12ea6b8a9430f3c8b9885156c","target":"graph","created_at":"2026-05-18T01:26:57Z","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 family of the superconducting quasi-skutterudites (Ca$_x$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$ features a structural quantum critical point at $x_c=0.9$, around which a dome-shaped variation of the superconducting transition temperature $T_c$ is found. Using specific heat, we probe the normal and the superconducting states of the entire series straddling the quantum critical point. Our analysis indicates a significant lowering of the effective Debye temperature on approaching $x_c$, which we interpret as a result of phonon softening accompanying the structural instability. Furthermore, a remarkab","authors_text":"Chishiro Michioka, Kazuyoshi Yoshimura, Masaki Imai, Paul J. Saines, Swee K. Goh, Takuya Matsumoto, Wing Chi Yu, Yiu Wing Cheung","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-10T12:40:16Z","title":"Strong Coupling Superconductivity in the Vicinity of the Structural Quantum Critical Point in (Ca$_x$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03126","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:e039a32b7622f0ca9cd497169adf46226e54ab84fccf8cc8a3be2c5d718158ed","target":"record","created_at":"2026-05-18T01:26:57Z","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":"b6397e4a7bffa50069f399036ca551c8f0e05fa1c4a578b2e28303e122abc642","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-10T12:40:16Z","title_canon_sha256":"37e563888beb5ca1f38e1385aab5d04d71ebc206974ecc914bb6604c4139e712"},"schema_version":"1.0","source":{"id":"1509.03126","kind":"arxiv","version":2}},"canonical_sha256":"43d591e701af36f3c64192a97fcea5741d1fa1322cc8a106d9ba899e512d613a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"43d591e701af36f3c64192a97fcea5741d1fa1322cc8a106d9ba899e512d613a","first_computed_at":"2026-05-18T01:26:57.281708Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:57.281708Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U3zzGPFh6i2k3QjK6FSSBkFCygx944Ks2nntkxKk4Z9IQ5HHSQwT5pY3DhoFInkPF/7bXKNqP93ddypEu1oLAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:57.282368Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.03126","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e039a32b7622f0ca9cd497169adf46226e54ab84fccf8cc8a3be2c5d718158ed","sha256:3356a9ba6352f34b92fd0b549920698a778b85c12ea6b8a9430f3c8b9885156c"],"state_sha256":"70c15e846b6049feee0f9c883fb7770ec96c46db7600ce226857151fc07036e6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JJjyhW10j7LMZ1R97jb3OvDnCRrJUAmHorklEUjz15yN0vewQLHAcXjgveHM+JZOBL3spnWuRbqEnFoGIet7Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T22:36:28.313214Z","bundle_sha256":"19708663c60b6fb3e89d05264ab3ed651dde04bed818b749048051be2c1876da"}}