{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:B73FZL2CMIRUM6VNRVWQP75426","short_pith_number":"pith:B73FZL2C","schema_version":"1.0","canonical_sha256":"0ff65caf426223467aad8d6d07ffbcd78da5d2b698b37eb3ecf3f2ec7d15d238","source":{"kind":"arxiv","id":"1808.04820","version":1},"attestation_state":"computed","paper":{"title":"The nature of the phase transition in the cuprates as revealed by a magnetic field free stiffness meter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Amit Keren, Itzik Kapon, Nir Gavish, Thomas Prokscha, Zaher Salman","submitted_at":"2018-08-14T18:00:01Z","abstract_excerpt":"A new method to measure the superconducting stiffness tensor $\\overline{\\rho}_s$, without subjecting the sample to magnetic field, is applied to La$_{1.875}$Sr$_{0.125}$CuO$_4$ (LSCO). The method is based on the London equation $\\bf{J}=-\\overline{\\rho}_s \\bf{A}$, where $\\bf{J}$ is the current density and $\\bf{A}$ is the vector potential. Using rotor free $\\bf{A}$ and measuring $\\bf{J}$ via the magnetic moment of superconducting rings, we extract $\\overline{\\rho}_s$ at $T\\rightarrow T_c$. The technique, named Stiffnessometer, is sensitive to very small stiffness, which translates to penetration"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1808.04820","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-08-14T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"22a150fbf718811e5451d63acbab6a87cca2aee256ae2ce2245b661b38369ed1","abstract_canon_sha256":"7ce81c9bc0bc640a74c3db52e2655cbf3de7a773eab6ea0e59673604a1f4349b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:58.888471Z","signature_b64":"i84tDMlomcxRI13mYV6NMnZiHEgeYvfrze1KTGV4R3uWYZIwVAbyDZnJweFUk3MfQiBHSIs3WTCclf4bBCJ8Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0ff65caf426223467aad8d6d07ffbcd78da5d2b698b37eb3ecf3f2ec7d15d238","last_reissued_at":"2026-05-17T23:42:58.888024Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:58.888024Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The nature of the phase transition in the cuprates as revealed by a magnetic field free stiffness meter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Amit Keren, Itzik Kapon, Nir Gavish, Thomas Prokscha, Zaher Salman","submitted_at":"2018-08-14T18:00:01Z","abstract_excerpt":"A new method to measure the superconducting stiffness tensor $\\overline{\\rho}_s$, without subjecting the sample to magnetic field, is applied to La$_{1.875}$Sr$_{0.125}$CuO$_4$ (LSCO). The method is based on the London equation $\\bf{J}=-\\overline{\\rho}_s \\bf{A}$, where $\\bf{J}$ is the current density and $\\bf{A}$ is the vector potential. Using rotor free $\\bf{A}$ and measuring $\\bf{J}$ via the magnetic moment of superconducting rings, we extract $\\overline{\\rho}_s$ at $T\\rightarrow T_c$. The technique, named Stiffnessometer, is sensitive to very small stiffness, which translates to penetration"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.04820","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1808.04820","created_at":"2026-05-17T23:42:58.888092+00:00"},{"alias_kind":"arxiv_version","alias_value":"1808.04820v1","created_at":"2026-05-17T23:42:58.888092+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.04820","created_at":"2026-05-17T23:42:58.888092+00:00"},{"alias_kind":"pith_short_12","alias_value":"B73FZL2CMIRU","created_at":"2026-05-18T12:32:13.499390+00:00"},{"alias_kind":"pith_short_16","alias_value":"B73FZL2CMIRUM6VN","created_at":"2026-05-18T12:32:13.499390+00:00"},{"alias_kind":"pith_short_8","alias_value":"B73FZL2C","created_at":"2026-05-18T12:32:13.499390+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/B73FZL2CMIRUM6VNRVWQP75426","json":"https://pith.science/pith/B73FZL2CMIRUM6VNRVWQP75426.json","graph_json":"https://pith.science/api/pith-number/B73FZL2CMIRUM6VNRVWQP75426/graph.json","events_json":"https://pith.science/api/pith-number/B73FZL2CMIRUM6VNRVWQP75426/events.json","paper":"https://pith.science/paper/B73FZL2C"},"agent_actions":{"view_html":"https://pith.science/pith/B73FZL2CMIRUM6VNRVWQP75426","download_json":"https://pith.science/pith/B73FZL2CMIRUM6VNRVWQP75426.json","view_paper":"https://pith.science/paper/B73FZL2C","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1808.04820&json=true","fetch_graph":"https://pith.science/api/pith-number/B73FZL2CMIRUM6VNRVWQP75426/graph.json","fetch_events":"https://pith.science/api/pith-number/B73FZL2CMIRUM6VNRVWQP75426/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/B73FZL2CMIRUM6VNRVWQP75426/action/timestamp_anchor","attest_storage":"https://pith.science/pith/B73FZL2CMIRUM6VNRVWQP75426/action/storage_attestation","attest_author":"https://pith.science/pith/B73FZL2CMIRUM6VNRVWQP75426/action/author_attestation","sign_citation":"https://pith.science/pith/B73FZL2CMIRUM6VNRVWQP75426/action/citation_signature","submit_replication":"https://pith.science/pith/B73FZL2CMIRUM6VNRVWQP75426/action/replication_record"}},"created_at":"2026-05-17T23:42:58.888092+00:00","updated_at":"2026-05-17T23:42:58.888092+00:00"}