{"id":3435,"date":"2021-05-20T16:29:00","date_gmt":"2021-05-20T14:29:00","guid":{"rendered":"https:\/\/equipes.lps.u-psud.fr\/meso\/?p=3435"},"modified":"2021-12-22T09:02:04","modified_gmt":"2021-12-22T08:02:04","slug":"collapse-of-the-josephson-emission-in-a-carbon-nanotube-junction","status":"publish","type":"post","link":"https:\/\/equipes.lps.u-psud.fr\/meso\/collapse-of-the-josephson-emission-in-a-carbon-nanotube-junction\/","title":{"rendered":"Collapse of the Josephson Emission in a Carbon Nanotube Junction"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">We have measured a surprising collapse of the high frequency emission of a superconducting junction made with a carbon nanotube. <\/p>\n\n\n\n<!--more-->\n\n\n\n<p class=\"wp-block-paragraph\">We probe the high frequency emission of a carbon nanotube based Josephson junction and compare it to<br>its dc Josephson current. The ac emission is probed by coupling the carbon nanotube to an on-chip detector<br>(a superconductor-insulator-superconductor junction), via a coplanar waveguide resonator. The measure-<br>ment of the photoassisted current of the detector gives direct access to the signal emitted by the carbon<br>nanotube. We focus on the gate regions that exhibit Kondo features in the normal state and demonstrate that<br>when the dc supercurrent is enhanced by the Kondo effect, the ac Josephson effect is strongly reduced. This<br>result is compared to numerical renormalization group theory and is attributed to a transition between the<br>singlet ground state and the doublet excited state which is enabled only when the junction is driven out-of-<br>equilibrium by a voltage bias.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"394\" height=\"175\" src=\"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-content\/uploads\/sites\/8\/2021\/09\/image.png\" alt=\"\" class=\"wp-image-3436\" srcset=\"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-content\/uploads\/sites\/8\/2021\/09\/image.png 394w, https:\/\/equipes.lps.u-psud.fr\/meso\/wp-content\/uploads\/sites\/8\/2021\/09\/image-300x133.png 300w\" sizes=\"auto, (max-width: 394px) 100vw, 394px\" \/><figcaption>Schematic picture of a nanotube Josephson junction in the Kondo regime, emitting a photon <\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">This work has been published in <a href=\"https:\/\/journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.126.126801\">Physical Review Letters<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We have measured a surprising collapse of the high frequency emission of a superconducting junction made with a carbon nanotube.<\/p>\n","protected":false},"author":18,"featured_media":3439,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,11],"tags":[],"class_list":["post-3435","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-highlights","category-news"],"_links":{"self":[{"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/posts\/3435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/comments?post=3435"}],"version-history":[{"count":3,"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/posts\/3435\/revisions"}],"predecessor-version":[{"id":3443,"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/posts\/3435\/revisions\/3443"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/media\/3439"}],"wp:attachment":[{"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/media?parent=3435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/categories?post=3435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/equipes.lps.u-psud.fr\/meso\/wp-json\/wp\/v2\/tags?post=3435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}