{"id":1218,"date":"2019-08-06T12:47:26","date_gmt":"2019-08-06T12:47:26","guid":{"rendered":"https:\/\/wp.icmm.csic.es\/tgqtn\/?p=1218"},"modified":"2019-08-12T00:24:31","modified_gmt":"2019-08-11T22:24:31","slug":"chiral-response-of-twisted-bilayer-graphene","status":"publish","type":"post","link":"https:\/\/wp.icmm.csic.es\/npqsic\/chiral-response-of-twisted-bilayer-graphene\/","title":{"rendered":"Chiral response of twisted bilayer graphene"},"content":{"rendered":"<p><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/our-people\/tobias-stauber\/\">T. Stauber<\/a>, T. Low and G. G\u00f3mez-Santos<br \/>\n<a href=\"https:\/\/journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.120.046801\">Phys. Rev. Lett. 120, 046801 (2018)<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1319 alignleft\" src=\"https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/08\/stauber2018-300x252.png\" alt=\"\" width=\"300\" height=\"252\" srcset=\"https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/08\/stauber2018-300x252.png 300w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/08\/stauber2018-768x645.png 768w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/08\/stauber2018-150x126.png 150w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/08\/stauber2018.png 897w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>We present an effective (minimal) theory for chiral two-dimensional materials. These materials possess an electromagnetic coupling without exhibiting a topological gap. As an example, we study the response of doped twisted bilayers, unveiling unusual phenomena in the zero frequency limit. An in-plane magnetic field induces a huge paramagnetic response at the neutrality point and, upon doping, also gives rise to a substantial longitudinal Hall response. The system also accommodates nontrivial longitudinal plasmonic modes that are associated with a longitudinal magnetic moment, thus endowing them with a chiral character. Finally, we note that the optical activity can be considerably enhanced upon doping and our general approach would enable systematic exploration of 2D material heterostructures with optical activity.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T. Stauber, T. Low and G. G\u00f3mez-Santos Phys. Rev. Lett. 120, 046801 (2018) We present an effective (minimal) theory for chiral two-dimensional materials. These materials possess an electromagnetic coupling without exhibiting a topological gap. As an example, we study the response of doped twisted bilayers, unveiling unusual phenomena in the&#8230;<\/p>\n<p class=\"continue-reading-button\"> <a class=\"continue-reading-link\" href=\"https:\/\/wp.icmm.csic.es\/npqsic\/chiral-response-of-twisted-bilayer-graphene\/\">Continue reading<i class=\"crycon-right-dir\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":1277,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[12,8,13],"tags":[],"class_list":["post-1218","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-12","category-publications","category-stauber"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/posts\/1218","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/comments?post=1218"}],"version-history":[{"count":6,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/posts\/1218\/revisions"}],"predecessor-version":[{"id":1321,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/posts\/1218\/revisions\/1321"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/media\/1277"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/media?parent=1218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/categories?post=1218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/tags?post=1218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}