{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["14(1)"],"submitter":["Vaquero D"],"pubmed_abstract":["The quantum Hall (QH) effect in two-dimensional electron systems (2DESs) is conventionally observed at liquid-helium temperatures, where lattice vibrations are strongly suppressed and bulk carrier scattering is dominated by disorder. However, due to large Landau level (LL) separation (~2000 K at B = 30 T), graphene can support the QH effect up to room temperature (RT), concomitant with a non-negligible population of acoustic phonons with a wave-vector commensurate to the inverse electronic magnetic length. Here, we demonstrate that graphene encapsulated in hexagonal boron nitride (hBN) realizes a novel transport regime, where dissipation in the QH phase is governed predominantly by electron-phonon scattering. Investigating thermally-activated transport at filling factor 2 up to RT in an ensemble of back-gated devices, we show that the high B-field behaviour correlates with their zero B-field transport mobility. By this means, we extend the well-accepted notion of phonon-limited resistivity in ultra-clean graphene to a hitherto unexplored high-field realm."],"journal":["Nature communications"],"pagination":["318"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9852447"],"repository":["biostudies-literature"],"pubmed_title":["Phonon-mediated room-temperature quantum Hall transport in graphene."],"pmcid":["PMC9852447"],"pubmed_authors":["Beschoten B","Stampfer C","Salvador-Sanchez J","Clerico V","Muller CSA","Vaquero D","Taniguchi T","Schmitz M","Wiedmann S","Delgado-Notario JA","Katsnelson MI","Rubi K","Watanabe K","Martin-Ramos A","Pezzini S","Diez E","Zeitler U"],"additional_accession":[]},"is_claimable":false,"name":"Phonon-mediated room-temperature quantum Hall transport in graphene.","description":"The quantum Hall (QH) effect in two-dimensional electron systems (2DESs) is conventionally observed at liquid-helium temperatures, where lattice vibrations are strongly suppressed and bulk carrier scattering is dominated by disorder. However, due to large Landau level (LL) separation (~2000 K at B = 30 T), graphene can support the QH effect up to room temperature (RT), concomitant with a non-negligible population of acoustic phonons with a wave-vector commensurate to the inverse electronic magnetic length. Here, we demonstrate that graphene encapsulated in hexagonal boron nitride (hBN) realizes a novel transport regime, where dissipation in the QH phase is governed predominantly by electron-phonon scattering. Investigating thermally-activated transport at filling factor 2 up to RT in an ensemble of back-gated devices, we show that the high B-field behaviour correlates with their zero B-field transport mobility. By this means, we extend the well-accepted notion of phonon-limited resistivity in ultra-clean graphene to a hitherto unexplored high-field realm.","dates":{"release":"2023-01-01T00:00:00Z","publication":"2023 Jan","modification":"2025-04-22T01:07:59.822Z","creation":"2025-04-05T19:49:51.512Z"},"accession":"S-EPMC9852447","cross_references":{"pubmed":["36658139"],"doi":["10.1038/s41467-023-35986-3"]}}