{"id":119768,"date":"2021-02-19T15:22:59","date_gmt":"2021-02-19T23:22:59","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2021\/02\/twisted-trilayer-graphene-could-help-make-high-temperature-superconductors"},"modified":"2021-02-19T15:22:59","modified_gmt":"2021-02-19T23:22:59","slug":"twisted-trilayer-graphene-could-help-make-high-temperature-superconductors","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2021\/02\/twisted-trilayer-graphene-could-help-make-high-temperature-superconductors","title":{"rendered":"Twisted trilayer graphene could help make high-temperature superconductors"},"content":{"rendered":"

<\/a><\/p>\n

Two\u2019s company, but three\u2019s a crowd \u2013 unless you\u2019re trying to make graphene superconduct at higher temperatures. That is the finding of researchers at Harvard University in the US, who discovered that the superconducting state in three stacked and twisted layers of graphene is more robust to temperature increase than the equivalent state in two-layer graphene. The researchers also found evidence that superconductivity in the trilayer system comes from strong interactions between electrons, rather than weak ones as in most conventional superconductors \u2013 corroborating a result reported a few days earlier<\/a> by a separate team at the Massachusetts Institute of Technology (MIT).<\/p>\n

A sheet of graphene consists of a simple repetition of carbon atoms arranged in a two-dimensional hexagonal lattice. When two sheets of graphene are placed atop each other and slightly misaligned, they form a moir\u00e9 pattern, or \u201cstretched\u201d superlattice that dramatically changes the electronic interactions in the material compared to its pristine counterpart. The misalignment angle is critical: in 2018, the MIT group, led by Pablo Jarillo-Herrero,<\/a> discovered a so-called \u201cmagic\u201d angle of 1.1\u00b0 where the material switches from an insulator to a superconductor. This means the twisted graphene can carry electrical current with no resistance below a superconducting transition temperature, Tc<\/sub>, of 1.7 K.<\/p>\n","protected":false},"excerpt":{"rendered":"

Two\u2019s company, but three\u2019s a crowd \u2013 unless you\u2019re trying to make graphene superconduct at higher temperatures. That is the finding of researchers at Harvard University in the US, who discovered that the superconducting state in three stacked and twisted layers of graphene is more robust to temperature increase than the equivalent state in two-layer [\u2026]<\/p>\n","protected":false},"author":396,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1635,48],"tags":[],"class_list":["post-119768","post","type-post","status-publish","format-standard","hentry","category-materials","category-particle-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/119768","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/396"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=119768"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/119768\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=119768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=119768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=119768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}