{"id":12329,"date":"2023-11-21T15:38:32","date_gmt":"2023-11-21T14:38:32","guid":{"rendered":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/?p=12329"},"modified":"2023-11-21T16:17:42","modified_gmt":"2023-11-21T15:17:42","slug":"determination-of-the-thermomigration-force-on-adatoms","status":"publish","type":"post","link":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/2023\/11\/21\/determination-of-the-thermomigration-force-on-adatoms\/","title":{"rendered":"Determination of the thermomigration force on adatoms"},"content":{"rendered":"<p>In cell phones and other devices, a large temperature difference across a microcircuit can cause atoms to migrate, eventually resulting in faulty electrical connections. This so-called thermomigration has now been tracked at the nanoscale. To quantify the resulting atomic fluxes induced by the thermal gradient we have used <em>in operando<\/em> low energy electron microscopy on a silicon surface under a thermal gradient of 10^<sup>4<\/sup> K\/m. The thermomigration is measured on metastable Si(111)-1&#215;1 advacancy islands. The islands move in the direction of the thermal gradient at 0.26\u00b10.06 nm\/s. This reveals that the adatoms move towards the cold region and the effective force exerted on Si adatoms is 1.4\u00b10.4 x10^<sup>-8<\/sup> eV\/nm. We quantify the heat of transport of Si adatoms Q*= 1.2\u00b10.4 eV and show that it corresponds to the combined effects of adatom creation at step edges and adatom diffusion on atomically flat terraces. This article is published in Physical Review Letters<\/p>\n<p>Phys. Rev. Lett. 131, 116202 \u2013 Published 15 September 2023<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new publication in NM Department<\/p>\n","protected":false},"author":16,"featured_media":12324,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[31],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/posts\/12329"}],"collection":[{"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/comments?post=12329"}],"version-history":[{"count":2,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/posts\/12329\/revisions"}],"predecessor-version":[{"id":12333,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/posts\/12329\/revisions\/12333"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/media\/12324"}],"wp:attachment":[{"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/media?parent=12329"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/categories?post=12329"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/tags?post=12329"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}