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Recent experimental studies reported tunability of these properties by changes of chemical environments or by application of external stimuli for device applications. In order to provide insight onto the origin and mechanism of such tunability, here we investigate the magnetic hyperfine and nuclear quadrupole interactions for $^{159}$Tb nucleus in TbPc$_2$ (Pc=phthalocyanine) single-molecule magnets using multireference ab-initio methods including spin-orbit inter"},"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":"1910.11952","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-10-25T22:00:47Z","cross_cats_sorted":["physics.chem-ph","physics.comp-ph","quant-ph"],"title_canon_sha256":"e952151f10dc5bd774fd41f6efa26f5a05cd67a61f6610f98fcf37b96a59d7ba","abstract_canon_sha256":"7f079806c072df8cfef3e2472b19d5e3f56baabd53e09a3bc0b8b3faf8651b19"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:15:11.297964Z","signature_b64":"k5QKQHKbJA10XxrWZf8FpwEgqrnyuo9TVpx9BZ8bbC1QStpvc9OPQF2H/IeUGteFtzh+lro0Xd1xfoYvLPnsBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1ef2ba51feb98efc42c044243c1e64ecb3df22e23cc2695134a4127516d05158","last_reissued_at":"2026-07-05T00:15:11.297501Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:15:11.297501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nature of hyperfine interactions in TbPc$_2$ single-molecule magnets: Multireference ab-initio study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph","physics.comp-ph","quant-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Aleksander L. 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