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001025617 1001_ $$0P:(DE-HGF)0$$aVaquero, Daniel$$b0
001025617 245__ $$aPhonon-mediated room-temperature quantum Hall transport in graphene
001025617 260__ $$a[London]$$bNature Publishing Group UK$$c2023
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001025617 520__ $$aThe 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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001025617 7001_ $$0P:(DE-HGF)0$$aClericò, Vito$$b1
001025617 7001_ $$0P:(DE-HGF)0$$aSchmitz, Michael$$b2
001025617 7001_ $$0P:(DE-HGF)0$$aDelgado-Notario, Juan Antonio$$b3
001025617 7001_ $$0P:(DE-HGF)0$$aMartín-Ramos, Adrian$$b4
001025617 7001_ $$0P:(DE-HGF)0$$aSalvador-Sánchez, Juan$$b5
001025617 7001_ $$0P:(DE-HGF)0$$aMüller, Claudius S. A.$$b6
001025617 7001_ $$0P:(DE-HGF)0$$aRubi, Km$$b7
001025617 7001_ $$0P:(DE-HGF)0$$aWatanabe, Kenji$$b8
001025617 7001_ $$0P:(DE-HGF)0$$aTaniguchi, Takashi$$b9
001025617 7001_ $$0P:(DE-Juel1)178028$$aBeschoten, Bernd$$b10$$ufzj
001025617 7001_ $$0P:(DE-Juel1)180322$$aStampfer, Christoph$$b11$$ufzj
001025617 7001_ $$0P:(DE-HGF)0$$aDiez, Enrique$$b12
001025617 7001_ $$0P:(DE-HGF)0$$aKatsnelson, Mikhail I.$$b13
001025617 7001_ $$0P:(DE-HGF)0$$aZeitler, Uli$$b14
001025617 7001_ $$0P:(DE-HGF)0$$aWiedmann, Steffen$$b15
001025617 7001_ $$0P:(DE-HGF)0$$aPezzini, Sergio$$b16$$eCorresponding author
001025617 773__ $$0PERI:(DE-600)2553671-0$$a10.1038/s41467-023-35986-3$$gVol. 14, no. 1, p. 318$$n1$$p318$$tNature Communications$$v14$$x2041-1723$$y2023
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