{"id":50,"date":"2015-07-08T12:09:55","date_gmt":"2015-07-08T19:09:55","guid":{"rendered":"http:\/\/labs.wsu.edu\/tomsovic\/?page_id=50"},"modified":"2026-04-10T12:04:55","modified_gmt":"2026-04-10T19:04:55","slug":"scanning-gate-microscopy-of-a-quantum-point-contact","status":"publish","type":"page","link":"https:\/\/labs.wsu.edu\/tomsovic\/scanning-gate-microscopy-of-a-quantum-point-contact\/","title":{"rendered":"Scanning gate microscopy of a quantum point contact"},"content":{"rendered":"<div class=\"wsu-row wsu-row--single\" >\r\n    \n<div class=\"wsu-column\"  style=\"\">\r\n\t\n\n<h2 class=\"wp-block-heading\">What is measured in the scanning gate microscopy of a quantum point contact?<\/h2>\n\n\n\n<p>The conductance change due to a local perturbation in a phase-coherent nanostructure is calculated. The general expressions to first- and second-order in the perturbation are applied to the scanning gate microscopy of a two-dimensional electron gas containing a quantum point contact. The first-order correction depends on two scattering states with electrons incoming from opposite leads, and is suppressed on a conductance plateau; it is significant in the step regions. On the plateaus, the dominant second-order term likewise depends on scattering states incoming from both sides. It is always negative, exhibits fringes, and has a spatial decay consistent with experiments.<\/p>\n\n<\/div>\r\n\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1067,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"categories":[],"tags":[],"wsuwp_university_location":[2],"wsuwp_university_org":[],"_links":{"self":[{"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/pages\/50"}],"collection":[{"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/users\/1067"}],"replies":[{"embeddable":true,"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/comments?post=50"}],"version-history":[{"count":2,"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/pages\/50\/revisions"}],"predecessor-version":[{"id":314,"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/pages\/50\/revisions\/314"}],"wp:attachment":[{"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/media?parent=50"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/categories?post=50"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/tags?post=50"},{"taxonomy":"wsuwp_university_location","embeddable":true,"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/wsuwp_university_location?post=50"},{"taxonomy":"wsuwp_university_org","embeddable":true,"href":"https:\/\/labs.wsu.edu\/tomsovic\/wp-json\/wp\/v2\/wsuwp_university_org?post=50"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}