{"paper":{"title":"(Sub)surface mobility of oxygen vacancies at the TiO$_2$ anatase (101) surface","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Annabella Selloni, Martin Fidler, Michael Schmid, Olga Dulub, Philipp Scheiber, Ulrich Aschauer, Ulrike Diebold, Weiyi Hou","submitted_at":"2018-04-12T09:40:33Z","abstract_excerpt":"Anatase is a metastable polymorph of TiO$_2$. In contrast to the more widely-studied TiO$_2$ rutile, O vacancies (V$_\\mathrm O$'s) are not stable at the anatase (101) surface. Low-temperature STM shows that surface V$_\\mathrm O$'s, created by electron bombardment at 105 K, start migrating to subsurface sites at temperatures $\\geq$ 200 K. After an initial decrease of the V$_\\mathrm O$ density, a temperature-dependent dynamic equilibrium is established where V$_\\mathrm O$'s move to subsurface sites and back again, as seen in time-lapse STM images. We estimate that activation energies for subsurf"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04398","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"}