{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:BNVJOFPYSWQIIHXOC4KBFYKQCR","short_pith_number":"pith:BNVJOFPY","schema_version":"1.0","canonical_sha256":"0b6a9715f895a0841eee171412e1501477d0a69d22e51fb04c8136879b83a390","source":{"kind":"arxiv","id":"2109.06769","version":2},"attestation_state":"computed","paper":{"title":"Valence state determines the band magnetocrystalline anisotropy in 2D rare-earth/noble-metal compounds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"F. Bertran, F. Schiller, J.E. Ortega, K. Ali, L. Fernandez, M. Blanco-Rey, P. Gargiani, P.M. Sheverdyaeva, R. Castrillo-Bodero","submitted_at":"2021-09-14T15:36:09Z","abstract_excerpt":"In intermetallic compounds with zero-orbital momentum ($L=0$) the magnetic anisotropy and the electronic band structure are interconnected. Here, we investigate this connection on divalent Eu and trivalent Gd intermetallic compounds. We find by X-ray magnetic circular dichroism an out-of-plane easy magetization axis in 2D atom-thick EuAu$_2$. Angle-resolved photoemission and density-functional theory prove that this is due to strong $f-d$ band hybridization and Eu$^{2+}$ valence. In contrast, the easy in-plane magnetization of the structurally-equivalent GdAu$_2$ is ruled by spin-orbit-split $"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2109.06769","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-09-14T15:36:09Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"f6647e8a62c46012219a3995779279c2185b35cf16c06c5dcefc552d4ccd5218","abstract_canon_sha256":"f09a5ca6455d252aa74a42a7219e1924629a46cbd0c8f8d42f908b7fdfe573a3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:31:11.173584Z","signature_b64":"RAOXNcCLKbUVCASjk/V5JSyjkSkJJMQz/hwnc7tIMtNx3ATl87HRNC0hAkmd6T2cLUqBRwhnvrs9zqWYqSTyDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b6a9715f895a0841eee171412e1501477d0a69d22e51fb04c8136879b83a390","last_reissued_at":"2026-07-05T05:31:11.173127Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:31:11.173127Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Valence state determines the band magnetocrystalline anisotropy in 2D rare-earth/noble-metal compounds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"F. Bertran, F. Schiller, J.E. Ortega, K. Ali, L. Fernandez, M. Blanco-Rey, P. Gargiani, P.M. Sheverdyaeva, R. Castrillo-Bodero","submitted_at":"2021-09-14T15:36:09Z","abstract_excerpt":"In intermetallic compounds with zero-orbital momentum ($L=0$) the magnetic anisotropy and the electronic band structure are interconnected. Here, we investigate this connection on divalent Eu and trivalent Gd intermetallic compounds. We find by X-ray magnetic circular dichroism an out-of-plane easy magetization axis in 2D atom-thick EuAu$_2$. Angle-resolved photoemission and density-functional theory prove that this is due to strong $f-d$ band hybridization and Eu$^{2+}$ valence. In contrast, the easy in-plane magnetization of the structurally-equivalent GdAu$_2$ is ruled by spin-orbit-split $"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.06769","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2109.06769/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2109.06769","created_at":"2026-07-05T05:31:11.173184+00:00"},{"alias_kind":"arxiv_version","alias_value":"2109.06769v2","created_at":"2026-07-05T05:31:11.173184+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.06769","created_at":"2026-07-05T05:31:11.173184+00:00"},{"alias_kind":"pith_short_12","alias_value":"BNVJOFPYSWQI","created_at":"2026-07-05T05:31:11.173184+00:00"},{"alias_kind":"pith_short_16","alias_value":"BNVJOFPYSWQIIHXO","created_at":"2026-07-05T05:31:11.173184+00:00"},{"alias_kind":"pith_short_8","alias_value":"BNVJOFPY","created_at":"2026-07-05T05:31:11.173184+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/BNVJOFPYSWQIIHXOC4KBFYKQCR","json":"https://pith.science/pith/BNVJOFPYSWQIIHXOC4KBFYKQCR.json","graph_json":"https://pith.science/api/pith-number/BNVJOFPYSWQIIHXOC4KBFYKQCR/graph.json","events_json":"https://pith.science/api/pith-number/BNVJOFPYSWQIIHXOC4KBFYKQCR/events.json","paper":"https://pith.science/paper/BNVJOFPY"},"agent_actions":{"view_html":"https://pith.science/pith/BNVJOFPYSWQIIHXOC4KBFYKQCR","download_json":"https://pith.science/pith/BNVJOFPYSWQIIHXOC4KBFYKQCR.json","view_paper":"https://pith.science/paper/BNVJOFPY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2109.06769&json=true","fetch_graph":"https://pith.science/api/pith-number/BNVJOFPYSWQIIHXOC4KBFYKQCR/graph.json","fetch_events":"https://pith.science/api/pith-number/BNVJOFPYSWQIIHXOC4KBFYKQCR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/BNVJOFPYSWQIIHXOC4KBFYKQCR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/BNVJOFPYSWQIIHXOC4KBFYKQCR/action/storage_attestation","attest_author":"https://pith.science/pith/BNVJOFPYSWQIIHXOC4KBFYKQCR/action/author_attestation","sign_citation":"https://pith.science/pith/BNVJOFPYSWQIIHXOC4KBFYKQCR/action/citation_signature","submit_replication":"https://pith.science/pith/BNVJOFPYSWQIIHXOC4KBFYKQCR/action/replication_record"}},"created_at":"2026-07-05T05:31:11.173184+00:00","updated_at":"2026-07-05T05:31:11.173184+00:00"}