{"id":244456,"date":"2026-09-24T01:23:57","date_gmt":"2026-09-24T06:23:57","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/09\/graphene-measurements-reveal-energy-loss-and-quantum-coherence-exponents-diverge-under-gate-control"},"modified":"2026-09-24T01:23:57","modified_gmt":"2026-09-24T06:23:57","slug":"graphene-measurements-reveal-energy-loss-and-quantum-coherence-exponents-diverge-under-gate-control","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/09\/graphene-measurements-reveal-energy-loss-and-quantum-coherence-exponents-diverge-under-gate-control","title":{"rendered":"Graphene measurements reveal energy-loss and quantum-coherence exponents diverge under gate control"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/graphene-measurements-reveal-energy-loss-and-quantum-coherence-exponents-diverge-under-gate-control.jpg\"><\/a><\/p>\n<p>Scientists have shown that the two exponents (inelastic scattering exponent and dephasing exponent) commonly used to describe electron scattering in graphene do not necessarily follow the same behavior. Using gated epitaxial graphene, a multi-institutional team of researchers independently extracted the two exponents through current-heating measurements and weak-localization analysis. The contrasting gate-voltage dependence provides evidence that energy relaxation and loss of quantum phase coherence can be governed by different microscopic processes.<\/p>\n<p>The team was led by Dr. Wei-Chen Lin at National Taiwan University and collaborating institutions. Their <a href=\"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S000862232600730X\" target=\"_blank\">study<\/a>, published in <i>Carbon<\/i>, challenges a long-standing assumption that the exponents used to characterize these two processes should be equivalent.<\/p>\n<p>An electron in a solid can lose energy through inelastic scattering, while quantum coherence can be lost when the phase relationship between electron wave functions is disrupted. These two phenomena are closely related, but they do not necessarily provide the same information. In this study, scientists used epitaxial graphene grown on silicon carbide and controlled its carrier density with a gate voltage.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Scientists have shown that the two exponents (inelastic scattering exponent and dephasing exponent) commonly used to describe electron scattering in graphene do not necessarily follow the same behavior. Using gated epitaxial graphene, a multi-institutional team of researchers independently extracted the two exponents through current-heating measurements and weak-localization analysis. The contrasting gate-voltage dependence provides evidence that [\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-244456","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\/244456","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=244456"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/244456\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=244456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=244456"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=244456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}