{"id":214186,"date":"2025-05-17T05:21:26","date_gmt":"2025-05-17T10:21:26","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2025\/05\/two-distinct-exciton-states-observed-in-2h-stacked-bilayer-molybdenum-diselenide"},"modified":"2025-05-17T05:21:26","modified_gmt":"2025-05-17T10:21:26","slug":"two-distinct-exciton-states-observed-in-2h-stacked-bilayer-molybdenum-diselenide","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2025\/05\/two-distinct-exciton-states-observed-in-2h-stacked-bilayer-molybdenum-diselenide","title":{"rendered":"Two distinct exciton states observed in 2H stacked bilayer molybdenum diselenide"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/two-distinct-exciton-states-observed-in-2h-stacked-bilayer-molybdenum-diselenide2.jpg\"><\/a><\/p>\n<p>Two-dimensional (2D) materials have proved to be a promising platform for studying exotic quasiparticles, such as excitons. Excitons are bound states that emerge when an electron in a material absorbs energy and rises to a higher energy level, leaving a hole (i.e., the absence of an electron) at the site that it used to occupy.<\/p>\n<p>Researchers at Heriot-Watt University and other institutes recently observed two distinct exciton states in bilayer molybdenum diselenide (MoSe\u2082) with a 2H-stacked configuration, which involves the alignment of two monolayers with a characteristic rotational symmetry. Their paper, <a href=\"https:\/\/link.aps.org\/doi\/10.1103\/PhysRevLett.134.166901\" target=\"_blank\">published<\/a> in <i>Physical Review Letters<\/i>, reports the observation of one of these states known as quadrupolar excitons in 2H-MoSe\u2082<\/p>\n<p>\u201cOur work was inspired by the ongoing effort to explore and control excitonic phenomena in atomically thin semiconductor materials, which are rich platforms for studying <a href=\"https:\/\/phys.org\/tags\/complex+quantum+states\/\" rel=\"tag\" class=\"\">complex quantum states<\/a>,\u201d Mauro Brotons-Gisbert, senior author of the paper, told Phys.org. \u201cIn particular, bilayer transition metal dichalcogenides (TMDs) like MoSe\u2082 naturally host interlayer excitons with a dipolar character\u2014 <a href=\"https:\/\/phys.org\/tags\/bound+states\/\" rel=\"tag\" class=\"\">bound states<\/a> of electrons and holes residing in adjacent layers.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Two-dimensional (2D) materials have proved to be a promising platform for studying exotic quasiparticles, such as excitons. Excitons are bound states that emerge when an electron in a material absorbs energy and rises to a higher energy level, leaving a hole (i.e., the absence of an electron) at the site that it used to occupy. [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1497,1617],"tags":[],"class_list":["post-214186","post","type-post","status-publish","format-standard","hentry","category-energy","category-quantum-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/214186","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\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=214186"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/214186\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=214186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=214186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=214186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}