{"paper":{"title":"Evolution of charge-density-wave soft phonon modes in $\\mathrm{Pd}_x\\mathrm{ErTe}_3$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Intercalating palladium into ErTe3 fully suppresses the a-CDW order while residual diffuse scattering at the a-wavevector arises from c-CDW phonon softening.","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Ahmet Alatas, Anisha G. Singh, Avishek Maity, Ayman H. Said, Frank Weber, Ian R. Fisher, Joshua A. W. Straquadine, Matthew J. Krogstad, Raymond Osborn, Rolf Heid, Stephan Rosenkranz","submitted_at":"2025-12-20T19:11:30Z","abstract_excerpt":"We investigated the lattice dynamics of quasi-two-dimensional Pd-intercalated $\\mathrm{ErTe}_3$ in relation to its charge-density-wave (CDW) transitions by means of x-ray diffuse and meV-resolution inelastic x-ray scattering. In pristine $\\mathrm{ErTe}_3$, CDW order develops at orthogonal in-plane wave vectors $\\boldsymbol{\\mathrm{q}}_{1}^{c} = (0, 0, 0.29)$ (the $c\\text{-}\\mathrm{CDW}$) and $\\boldsymbol{\\mathrm{q}}_{2}^{a} = (0.31, 0, 0)$ (the $a\\text{-}\\mathrm{CDW}$), with transition temperatures $T_{1}^{c} = 270$ K and $T_{2}^{a} = 160$ K, respectively. Remarkably, we observe diffuse x-ray "},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"These findings suggest that the a-CDW is fully suppressed for x ≥ 0.02, and that the residual diffuse scattering at q1^a originates from the partial phonon softening associated with the c-CDW, reflected by the near equality of the absolute size of q1^c and q1^a.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the near equality of the absolute magnitudes of q1^c and q1^a is sufficient to attribute all residual diffuse scattering at q1^a to c-CDW phonon softening rather than incomplete suppression or other scattering contributions.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Pd intercalation above x=0.02 suppresses the a-CDW in ErTe3, with residual diffuse scattering at q=(0.29,0,0) arising from partial phonon softening of the c-CDW due to nearly equal wave-vector magnitudes.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Intercalating palladium into ErTe3 fully suppresses the a-CDW order while residual diffuse scattering at the a-wavevector arises from c-CDW phonon softening.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"774226d804004af9f15e3756be83ea38c5297488b66f2f8ed6085712f6abdda6"},"source":{"id":"2512.18472","kind":"arxiv","version":2},"verdict":{"id":"532b54df-445b-4c22-9e27-f909ae285706","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-16T20:18:32.487627Z","strongest_claim":"These findings suggest that the a-CDW is fully suppressed for x ≥ 0.02, and that the residual diffuse scattering at q1^a originates from the partial phonon softening associated with the c-CDW, reflected by the near equality of the absolute size of q1^c and q1^a.","one_line_summary":"Pd intercalation above x=0.02 suppresses the a-CDW in ErTe3, with residual diffuse scattering at q=(0.29,0,0) arising from partial phonon softening of the c-CDW due to nearly equal wave-vector magnitudes.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the near equality of the absolute magnitudes of q1^c and q1^a is sufficient to attribute all residual diffuse scattering at q1^a to c-CDW phonon softening rather than incomplete suppression or other scattering contributions.","pith_extraction_headline":"Intercalating palladium into ErTe3 fully suppresses the a-CDW order while residual diffuse scattering at the a-wavevector arises from c-CDW phonon softening."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2512.18472/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":60,"sample":[{"doi":"","year":2025,"title":"Evolution of charge-density-wave soft phonon modes in $\\mathrm{Pd}_x\\mathrm{ErTe}_3$","work_id":"200f46e1-22f6-4f9b-88c4-4132776b3de4","ref_index":1,"cited_arxiv_id":"2512.18472","is_internal_anchor":true},{"doi":"","year":null,"title":"Furthermore, our results from phonon spectroscopy show that the XDS alonga ∗ in PdxErTe3 is related to a competing soft phonon mode and unrelated to thea-CDW present at low intercalation levels. II. E","work_id":"562ff2d5-c5c6-4e21-a160-f82239d673c9","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"1(d)] andq a 2 = (0.31,0,0) [marked by the white boxes in Fig","work_id":"a105eb18-c7d6-4906-9e84-896b97a77727","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"Background scattering [Qarea indicated by red boxes in Fig","work_id":"c16591f9-dcc0-4360-a837-8ee6860a70a9","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"3(a) and 3(b)] and 0.023 [Figs","work_id":"2972a8ac-2375-4b23-9bef-db6e67e1c9fd","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":60,"snapshot_sha256":"739214dc337afc513f659c7b8963aabb6d29969c993888f96e1759024d0b533d","internal_anchors":1},"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"}