{"paper":{"title":"Strongly enhanced lifetime of higher-order bimerons and antibimerons","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"In a van der Waals interface, high-Q bimerons and antibimerons live up to three orders of magnitude longer than |Q|=1 versions even at room temperature.","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Changsheng Song, Dongzhe Li, Moritz A. Goerzen, Shiwei Zhu, Stefan Heinze","submitted_at":"2025-10-29T13:01:57Z","abstract_excerpt":"Magnetic bimerons, similar to skyrmions, are topologically nontrivial spin textures characterized by topological charge $Q$. Most studies so far have focused on low-$Q$ solitons ($|Q| \\leq 1$), such as skyrmions, bimerons, and vortices. Here, we present the first calculations of the lifetimes of {ring-like} high-$Q$ bimerons and demonstrate that they are fundamentally more stable than high-$Q$ skyrmions over a wide range of temperature. To obtain realistic results, our chosen system is an experimentally feasible van der Waals interface, Fe$_3$GeTe$_2$/Cr$_2$Ge$_2$Te$_6$. We show that the lifet"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We show that the lifetimes of high-Q (anti)bimerons can exceed the lifetime of those with |Q|=1 by 3 orders of magnitude. Remarkably, this trend remains valid even when extrapolated to room temperature (RT), as the lifetimes are dominated by entropy rather than energy barriers. This contrasts with high-Q skyrmions, whose lifetimes fall with |Q| near RT.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The lifetime calculations and room-temperature extrapolation rest on the assumption that the chosen atomistic or micromagnetic model of the Fe3GeTe2/Cr2Ge2Te6 interface plus the entropy estimation method (likely transition-state or rate theory) accurately capture the Q-dependent fluctuation spectrum without post-hoc adjustments that alter the reported stability ordering.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"High-Q bimerons in Fe3GeTe2/Cr2Ge2Te6 show lifetimes three orders of magnitude longer than |Q|=1 bimerons at room temperature because entropy dominates decay rates.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"In a van der Waals interface, high-Q bimerons and antibimerons live up to three orders of magnitude longer than |Q|=1 versions even at room temperature.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"6d47dfb8459d75525daff1c83e1f3f29591f1e9e1e2addd2113c43624157ffcd"},"source":{"id":"2510.25478","kind":"arxiv","version":2},"verdict":{"id":"233795bf-f2c2-43ac-aa81-065f365ff357","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-18T03:22:59.707648Z","strongest_claim":"We show that the lifetimes of high-Q (anti)bimerons can exceed the lifetime of those with |Q|=1 by 3 orders of magnitude. Remarkably, this trend remains valid even when extrapolated to room temperature (RT), as the lifetimes are dominated by entropy rather than energy barriers. This contrasts with high-Q skyrmions, whose lifetimes fall with |Q| near RT.","one_line_summary":"High-Q bimerons in Fe3GeTe2/Cr2Ge2Te6 show lifetimes three orders of magnitude longer than |Q|=1 bimerons at room temperature because entropy dominates decay rates.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The lifetime calculations and room-temperature extrapolation rest on the assumption that the chosen atomistic or micromagnetic model of the Fe3GeTe2/Cr2Ge2Te6 interface plus the entropy estimation method (likely transition-state or rate theory) accurately capture the Q-dependent fluctuation spectrum without post-hoc adjustments that alter the reported stability ordering.","pith_extraction_headline":"In a van der Waals interface, high-Q bimerons and antibimerons live up to three orders of magnitude longer than |Q|=1 versions even at room temperature."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2510.25478/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":2,"snapshot_sha256":"b6955af1e7804b2f1c080e4ca1b940438f498d4e555e61d0a81a1e2bd3a57dc2"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}