{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:EMVUM2CP64FUNEDKEHMRZGMJ4U","short_pith_number":"pith:EMVUM2CP","schema_version":"1.0","canonical_sha256":"232b46684ff70b46906a21d91c9989e526b5814c3900a1965e4cc1774d336ec3","source":{"kind":"arxiv","id":"0706.3559","version":2},"attestation_state":"computed","paper":{"title":"Magnetic and Structural Studies of the Quasi-Two-Dimensional Spin-Gap System (CuCl)LaNb2O7","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"H. Kageyama, J. Yamaura, K. Yoshimura, M. Ichihara, M. Takigawa, M. Yoshida, N. Ogata, T. Kitano, Y. Ajiro","submitted_at":"2007-06-25T07:38:23Z","abstract_excerpt":"We report magnetization, nuclear magnetic resonance (NMR), nuclear quadrupole resonance (NQR), and transmission electron microscopy (TEM) studies on the quasi-two-dimensional spin-gap system (CuCl)LaNb2O7, a possible candidate for the J1-J2 model on a square lattice. A sharp single NQR line is observed at the Cu and Cl sites, indicating that both Cu and Cl atoms occupy a unique site. However, the electric field gradient tensors at the Cu, Cl, and La sites do not have axial symmetry. This is incompatible with the reported crystal structure. Thus the J1-J2 model has to be modified. We propose al"},"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":"0706.3559","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2007-06-25T07:38:23Z","cross_cats_sorted":[],"title_canon_sha256":"37ded8af56fee571ea0edfb57134ba8847bd91f9f62c876e905462145276bf41","abstract_canon_sha256":"aeb64d20c3440875bad2ec809742d0556df889349e235c14a1b94368580c456d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:29:16.178698Z","signature_b64":"g7JbNXqEWod8b/y62Gin6Pr8KA2g4kQtA3TApk6PwX5WxA8lrLQooj8AhSpjVFLBnyyxJVcgpuDcl8SFUyOZAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"232b46684ff70b46906a21d91c9989e526b5814c3900a1965e4cc1774d336ec3","last_reissued_at":"2026-05-18T00:29:16.178068Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:29:16.178068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Magnetic and Structural Studies of the Quasi-Two-Dimensional Spin-Gap System (CuCl)LaNb2O7","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"H. Kageyama, J. Yamaura, K. Yoshimura, M. Ichihara, M. Takigawa, M. Yoshida, N. Ogata, T. Kitano, Y. Ajiro","submitted_at":"2007-06-25T07:38:23Z","abstract_excerpt":"We report magnetization, nuclear magnetic resonance (NMR), nuclear quadrupole resonance (NQR), and transmission electron microscopy (TEM) studies on the quasi-two-dimensional spin-gap system (CuCl)LaNb2O7, a possible candidate for the J1-J2 model on a square lattice. A sharp single NQR line is observed at the Cu and Cl sites, indicating that both Cu and Cl atoms occupy a unique site. However, the electric field gradient tensors at the Cu, Cl, and La sites do not have axial symmetry. This is incompatible with the reported crystal structure. Thus the J1-J2 model has to be modified. We propose al"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.3559","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0706.3559","created_at":"2026-05-18T00:29:16.178170+00:00"},{"alias_kind":"arxiv_version","alias_value":"0706.3559v2","created_at":"2026-05-18T00:29:16.178170+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.3559","created_at":"2026-05-18T00:29:16.178170+00:00"},{"alias_kind":"pith_short_12","alias_value":"EMVUM2CP64FU","created_at":"2026-05-18T12:25:55.427421+00:00"},{"alias_kind":"pith_short_16","alias_value":"EMVUM2CP64FUNEDK","created_at":"2026-05-18T12:25:55.427421+00:00"},{"alias_kind":"pith_short_8","alias_value":"EMVUM2CP","created_at":"2026-05-18T12:25:55.427421+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/EMVUM2CP64FUNEDKEHMRZGMJ4U","json":"https://pith.science/pith/EMVUM2CP64FUNEDKEHMRZGMJ4U.json","graph_json":"https://pith.science/api/pith-number/EMVUM2CP64FUNEDKEHMRZGMJ4U/graph.json","events_json":"https://pith.science/api/pith-number/EMVUM2CP64FUNEDKEHMRZGMJ4U/events.json","paper":"https://pith.science/paper/EMVUM2CP"},"agent_actions":{"view_html":"https://pith.science/pith/EMVUM2CP64FUNEDKEHMRZGMJ4U","download_json":"https://pith.science/pith/EMVUM2CP64FUNEDKEHMRZGMJ4U.json","view_paper":"https://pith.science/paper/EMVUM2CP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0706.3559&json=true","fetch_graph":"https://pith.science/api/pith-number/EMVUM2CP64FUNEDKEHMRZGMJ4U/graph.json","fetch_events":"https://pith.science/api/pith-number/EMVUM2CP64FUNEDKEHMRZGMJ4U/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EMVUM2CP64FUNEDKEHMRZGMJ4U/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EMVUM2CP64FUNEDKEHMRZGMJ4U/action/storage_attestation","attest_author":"https://pith.science/pith/EMVUM2CP64FUNEDKEHMRZGMJ4U/action/author_attestation","sign_citation":"https://pith.science/pith/EMVUM2CP64FUNEDKEHMRZGMJ4U/action/citation_signature","submit_replication":"https://pith.science/pith/EMVUM2CP64FUNEDKEHMRZGMJ4U/action/replication_record"}},"created_at":"2026-05-18T00:29:16.178170+00:00","updated_at":"2026-05-18T00:29:16.178170+00:00"}