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We find that $(\\text{Sn}_\\text{Zn})$ and $(\\text{Ge}_\\text{Zn})$ introduce isolated energy levels deep in the band gap of ZnTe, derived from Sn-5s and Ge-4s states, respectively. Moreover, the incorporation of Sn and Ge on the Zn site is favored in p-type ZnTe, in both Zn-rich and Te-rich environments. The optical absorption spectra obtained by solving the Bethe-Salpeter equation reveals that sub-bandgap absorptance is greatly enhanced due to t"},"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":"1709.03277","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-09-11T07:36:37Z","cross_cats_sorted":[],"title_canon_sha256":"a5eeef16dfad998f0b2d26ab4945d1c55bdc8d00367c8458954c52dd1faf6d79","abstract_canon_sha256":"7c01cdb120ed6deacf35d9bcd10c6bcdf09693e522941d1050de92a801ef943d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:41.448500Z","signature_b64":"STxBPIqMCEcPIXY5iRWXreOy3CeqvcmV75ryjX/bkGyc++gUEtbTF6LHGuEPu8x/hUMUABuG6hb7xm6unNnPBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"13df8b698cafb29d7c3ebf019d0f2502fdd80c2e232494ae4ae88aa3162f185a","last_reissued_at":"2026-05-18T00:30:41.447548Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:41.447548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Defect properties of Sn- and Ge-doped ZnTe: Suitability for intermediate-band solar cells","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Mauricio A. 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