{"id":758,"date":"2019-07-17T11:52:07","date_gmt":"2019-07-17T09:52:07","guid":{"rendered":"https:\/\/sacepe-quest.neel.cnrs.fr\/?p=758"},"modified":"2019-09-08T20:38:52","modified_gmt":"2019-09-08T18:38:52","slug":"758","status":"publish","type":"post","link":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/2019\/07\/17\/758\/","title":{"rendered":"New preprint online on condmat: “Helical quantum Hall phase in graphene on SrTiO3”"},"content":{"rendered":"

Helical quantum Hall phase in graphene on SrTiO3<\/h2>\n

\"\"<\/h2>\n

The ground state of charge neutral graphene under perpendicular magnetic field was predicted to be a quantum Hall topological insulator with a ferromagnetic order and spin-filtered, helical edge channels. In most experiments, however, an otherwise insulating state is observed and is accounted for by lattice-scale interactions that promote a broken-symmetry state with gapped bulk and edge excitations. We tuned the ground state of the graphene zeroth Landau level to the topological phase via a suitable screening of the Coulomb interaction with a SrTiO<\/span>3<\/span><\/span><\/span><\/span><\/span> high-k<\/span><\/span><\/span><\/span> dielectric substrate. We observed robust helical edge transport emerging at a magnetic field as low as 1 tesla and withstanding temperatures up to 110 kelvins over micron-long distances. This new and versatile graphene platform opens new avenues for spintronics and topological quantum computation.<\/p>\n

Arxiv:1907.02299<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Helical quantum Hall phase in graphene on SrTiO3 The ground state of charge neutral graphene under perpendicular magnetic field was predicted to be a quantum Hall topological insulator with a ferromagnetic order and spin-filtered, helical edge channels. In most experiments,<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-758","post","type-post","status-publish","format-standard","hentry","category-non-classe"],"_links":{"self":[{"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/posts\/758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/comments?post=758"}],"version-history":[{"count":8,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/posts\/758\/revisions"}],"predecessor-version":[{"id":772,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/posts\/758\/revisions\/772"}],"wp:attachment":[{"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/media?parent=758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/categories?post=758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/tags?post=758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}