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Measurements of Co $L_3$-edge resonant inelastic X-ray scattering reveal the $t_{2g}$ electronic structure of Co for hole-doped La$_{2-x}$Sr$_x$CoO$_4$ ($x$ = 0.5, 0.7 and 0.8). As the Sr-doping $x$ increases, the tetragonal splitting of the $t_{2g}$ states of high-spin Co$^{2+}$ decreases, whereas that of low-spin Co$^{3+}$ increases and the fraction of high-spin Co$^{3+}$ increases. The results enable us to clarify the origin of the change of magnet"},"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":"2001.05194","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-01-15T09:26:21Z","cross_cats_sorted":[],"title_canon_sha256":"398391165434ca1b8da4850da6400d439fdda60da10f687c87d2e991ea63232a","abstract_canon_sha256":"de2b9e2d981fef534c1efd19dc9167d98daec44a930b1e7bdc99154c04dddf9d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:05:30.495913Z","signature_b64":"lyz4w3eg4QKvkZ4Sb0DRC7RNbVxL0RyTrA5B7vE7jEVxojvKYa6RusKRlMX93K/i4XVLSIZOTeu+W43k9SCXBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1222df907302786f8034c51b29275ff11bb75fc356fa68aaf6d8680c601be3fb","last_reissued_at":"2026-07-05T03:05:30.495375Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:05:30.495375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evolution of valence-specific spin states and local distortions in La$_{2-x}$Sr$_x$CoO$_4$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A. 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