{"paper":{"title":"Resonant x-ray diffraction from chiral electric-polarization structures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Gerrit van der Laan, Stephen W. Lovesey","submitted_at":"2018-08-13T13:39:57Z","abstract_excerpt":"Heterostructures of PbTiO$_3$/SrTiO$_3$ superlattices have shown the formation of \"polar vortices\", in which a continuous rotation of ferroelectric polarization spontaneously forms. Recently, Shafer {\\it{et al.}} [Proc.\\ Natl.\\ Acad.\\ Sci.\\ (PNAS) {\\bf{115}}, 915 (2018)] reported strong {\\it{non-magnetic}} circular dichroism (CD) in resonant soft x-ray diffraction at the Ti $L_3$ edge from such superlattices. The authors ascribe the CD to the chiral rotation of a polar vector. However, a polar vector is invisible to the parity-even electric-dipole transition which governs absorption in the sof"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.04204","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"}