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Evaluating ⟨L̂^z⟩ to leading order in perturbation theory, we find that the orbital response is suppressed near the Γ point and the BZ boundary, and enhanced at intermediate wave vectors -- a feature intimately tied to the degeneracy structure of the phonon bands.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The assumption that the rotational electron-phonon interaction is strictly proportional to L̂± and that leading-order perturbation theory suffices to capture the orbital response without higher-order corrections or strong-coupling effects, particularly given the reliance on line-group symmetry L3_1 for the threefold helical crystal.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Chiral phonons in L3_1 helical crystals generate rotational electron-phonon interactions that drive orbital angular momentum transfer m_ℓ to m_ℓ - m_s, with the response suppressed at Γ and zone boundary but enhanced at intermediate wavevectors due to phonon band degeneracies.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Chiral phonons in helical crystals transfer angular momentum to electron orbitals via crystal angular momentum conservation.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"8a1bc5616a696b41defef42b51209c7658744a8da7d38d29fb05c3898f2e2851"},"source":{"id":"2604.25328","kind":"arxiv","version":2},"verdict":{"id":"be03e1ea-75cf-4fc0-be41-5ed75e04fe77","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-07T14:00:36.787343Z","strongest_claim":"phonon-induced local rotations generate a rotational electron-phonon interaction proportional to L̂±, which drives the orbital transfer m_ℓ→m_ℓ−m_s in accordance with crystal angular momentum (CAM) conservation, where m_s=±1 denotes the eigenvalue of the phonon rotational mode. 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