{"id":157,"date":"2016-08-05T10:07:33","date_gmt":"2016-08-05T09:07:33","guid":{"rendered":"http:\/\/www.mub.eps.manchester.ac.uk\/in-abstract\/?p=157"},"modified":"2017-03-27T15:03:50","modified_gmt":"2017-03-27T14:03:50","slug":"tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures","status":"publish","type":"post","link":"https:\/\/www.mub.eps.manchester.ac.uk\/in-abstract\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\/","title":{"rendered":"Tuning the valley and chiral quantum state of Dirac electrons in van der Waals heterostructures"},"content":{"rendered":"<p><strong>Teasing out chirality in graphene<\/strong><\/p>\n<p>Researchers at the University of Manchester and the National Graphene Institute have reported the direct observation and manipulation of chirality and pseudospin in electrons that tunnel between two layers of graphene. Pseudospin is a property of electrons in graphene that arises due to the crystal structure of the material. Chirality is the projection of the pseudospin onto the electron\u2019s direction of motion and is analogous to the chiral properties of elementary particles.<\/p>\n<p>The researchers studied how electrons tunnel between two slightly misaligned graphene sheets (separated by a layer of insulating material) after applying a strong in-plane magnetic field to resolve the contributions of the chiral states.\u00a0 The chiral nature of the electrons imposed restrictions on the tunnelling, which made it possible to discern the signals of chirality in the data.\u00a0 A key outcome of this research is the demonstration that electrons with well-controlled pseudospin can be injected into graphene. The possibility to control these degrees of freedom in the future opens the door to ever more precise manipulation in new forms of semiconductor electronics such as \u2018chirotronics\u2019 and \u2018valleytronics\u2019.<\/p>\n<p class=\"button\"><a target=\"blank\" href=\"http:\/\/science.sciencemag.org\/content\/353\/6299\/575\" class=\"uom-button\">Click here to read the full article - DOI: 10.1126\/science.aaf4621<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Teasing out chirality in graphene Researchers at the University of Manchester and the National Graphene Institute have reported the direct observation and manipulation of chirality and pseudospin in electrons that tunnel between two layers of graphene. Pseudospin is a property of electrons in graphene that arises due to the crystal structure of the material. Chirality [&hellip;]<\/p>\n","protected":false},"author":65,"featured_media":500,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[15,11],"tags":[],"class_list":{"0":"post-157","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-edition-02","8":"category-physics-and-astronomy","9":"entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tuning the valley and chiral quantum state of Dirac electrons in van der Waals heterostructures - In Abstract<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mub.eps.manchester.ac.uk\/in-abstract\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tuning the valley and chiral quantum state of Dirac electrons in van der Waals heterostructures - In Abstract\" \/>\n<meta property=\"og:description\" content=\"Teasing out chirality in graphene Researchers at the University of Manchester and the National Graphene Institute have reported the direct observation and manipulation of chirality and pseudospin in electrons that tunnel between two layers of graphene. Pseudospin is a property of electrons in graphene that arises due to the crystal structure of the material. Chirality [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mub.eps.manchester.ac.uk\/in-abstract\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\/\" \/>\n<meta property=\"og:site_name\" content=\"In Abstract\" \/>\n<meta property=\"article:published_time\" content=\"2016-08-05T09:07:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-03-27T14:03:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.mub.eps.manchester.ac.uk\/in-abstract\/wp-content\/uploads\/sites\/61\/2017\/02\/Wallbank.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"890\" \/>\n\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Elena Zelenkova\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Elena Zelenkova\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.mub.eps.manchester.ac.uk\\\/in-abstract\\\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.mub.eps.manchester.ac.uk\\\/in-abstract\\\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\\\/\"},\"author\":{\"name\":\"Elena Zelenkova\",\"@id\":\"https:\\\/\\\/www.mub.eps.manchester.ac.uk\\\/in-abstract\\\/#\\\/schema\\\/person\\\/fce9bdc53f1f78d8bb561505dda887be\"},\"headline\":\"Tuning the valley and chiral quantum state of Dirac electrons in van der Waals heterostructures\",\"datePublished\":\"2016-08-05T09:07:33+00:00\",\"dateModified\":\"2017-03-27T14:03:50+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.mub.eps.manchester.ac.uk\\\/in-abstract\\\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\\\/\"},\"wordCount\":219,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.mub.eps.manchester.ac.uk\\\/in-abstract\\\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.mub.eps.manchester.ac.uk\\\/in-abstract\\\/wp-content\\\/uploads\\\/sites\\\/61\\\/2017\\\/02\\\/Wallbank.jpg\",\"articleSection\":[\"Edition 02\",\"Physics and Astronomy\"],\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.mub.eps.manchester.ac.uk\\\/in-abstract\\\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.mub.eps.manchester.ac.uk\\\/in-abstract\\\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\\\/\",\"url\":\"https:\\\/\\\/www.mub.eps.manchester.ac.uk\\\/in-abstract\\\/tuning-the-valley-and-chiral-quantum-state-of-dirac-electrons-in-van-der-waals-heterostructures\\\/\",\"name\":\"Tuning the valley and chiral quantum state of Dirac electrons in van der Waals heterostructures - 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