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024 7 _ |a 10.1038/s41467-023-35986-3
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100 1 _ |a Vaquero, Daniel
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245 _ _ |a Phonon-mediated room-temperature quantum Hall transport in graphene
260 _ _ |a [London]
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520 _ _ |a 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.
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700 1 _ |a Clericò, Vito
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700 1 _ |a Schmitz, Michael
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700 1 _ |a Delgado-Notario, Juan Antonio
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700 1 _ |a Martín-Ramos, Adrian
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700 1 _ |a Salvador-Sánchez, Juan
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700 1 _ |a Müller, Claudius S. A.
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700 1 _ |a Rubi, Km
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700 1 _ |a Watanabe, Kenji
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700 1 _ |a Taniguchi, Takashi
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700 1 _ |a Beschoten, Bernd
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700 1 _ |a Stampfer, Christoph
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700 1 _ |a Diez, Enrique
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700 1 _ |a Katsnelson, Mikhail I.
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700 1 _ |a Zeitler, Uli
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700 1 _ |a Wiedmann, Steffen
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700 1 _ |a Pezzini, Sergio
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773 _ _ |a 10.1038/s41467-023-35986-3
|g Vol. 14, no. 1, p. 318
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