{"paper":{"title":"Enhanced Tantalum Superconducting Resonator Performance via All-Surface Organic Monolayer Passivation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Self-assembled organic monolayers on tantalum suppress native oxide formation and raise superconducting resonator quality factors by 140 percent.","cross_cats":["physics.app-ph","quant-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Anna Cattani-Scholz, Benedikt Schoof, Harsh Gupta, Luca Rommeis, Marc Tornow, Moritz Singer, Shreya Sharma","submitted_at":"2026-04-23T23:11:23Z","abstract_excerpt":"Tantalum is a promising platform for superconducting quantum circuits, yet coherence times remain limited by dielectric losses from interfacial two-level systems (TLS), exacerbated by native oxide regrowth. Here, we implement molecular surface passivation using self-assembled organic monolayers on freshly etched tantalum and silicon in coplanar waveguide resonators. Surface characterization by contact angle, XPS, FTIR and TEM confirm the formation of ordered, nanometer-thick films that suppress oxide formation. Microwave measurements in the ~5-9 GHz range reveal internal quality factors up to "},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Microwave measurements in the ~5-9 GHz range reveal internal quality factors up to 1.8×10^6 in the single-photon regime at 100 mK, representing a ~140% improvement over untreated devices with native oxide.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The measured quality-factor gain is caused by reduced TLS losses from suppressed oxide formation, with the organic monolayer itself introducing negligible additional dielectric loss or decoherence channels.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"All-surface organic monolayer passivation on tantalum resonators raises internal quality factor by 140% to 1.8 million by cutting oxide-driven two-level system losses.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Self-assembled organic monolayers on tantalum suppress native oxide formation and raise superconducting resonator quality factors by 140 percent.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"d95b4220d05acd78444405f447e766c7daa5995296a5d02b37f515552d4eba0e"},"source":{"id":"2604.22112","kind":"arxiv","version":2},"verdict":{"id":"62343dce-2dc6-4c91-900e-96af72469876","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-09T20:43:59.223311Z","strongest_claim":"Microwave measurements in the ~5-9 GHz range reveal internal quality factors up to 1.8×10^6 in the single-photon regime at 100 mK, representing a ~140% improvement over untreated devices with native oxide.","one_line_summary":"All-surface organic monolayer passivation on tantalum resonators raises internal quality factor by 140% to 1.8 million by cutting oxide-driven two-level system losses.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The measured quality-factor gain is caused by reduced TLS losses from suppressed oxide formation, with the organic monolayer itself introducing negligible additional dielectric loss or decoherence channels.","pith_extraction_headline":"Self-assembled organic monolayers on tantalum suppress native oxide formation and raise superconducting resonator quality factors by 140 percent."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.22112/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"ai_meta_artifact","ran_at":"2026-05-21T11:36:31.164252Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-20T00:15:06.385586Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"dbf0ea3a19c5e46b1974f080e18477a705152c34e2d39227438d0d0b289819ab"},"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"}