Strange metallicity of moiré twisted bilayer graphene

Abstract

Recent measurements in several different laboratories report the observation of an approximately linear-in-temperature resistivity with a large twist-angle-dependent slope (or temperature coefficient) in moiré twisted bilayer graphene (tBLG) down to a few K and sometimes to much lower temperatures. In this note, we theoretically discuss this `strange metal' linear-in-temperature transport behavior from the perspective of resistive scattering by acoustic phonons, emphasizing the aspects of the transport data, which are and which are not consistent with the phonon scattering mechanism. Extensive theoretical comparison with a new experiment [A. Jaoui et al., Nature Physics 18, 633 (2022)] is the central new aspect of this work.

8 pages, 5 figures

References in corpus (10)

• Controlling electron-phonon interactions in graphene at ultra high carrier densities
• Acoustic phonon scattering limited carrier mobility in 2D extrinsic graphene
• Quantum critical behavior in magic-angle twisted bilayer graphene
• Transport and percolation in a low-density high-mobility two-dimensional hole system
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• Strange Metals from Melting Correlated Insulators in Twisted Bilayer Graphene
• Temperature-linear Resistivity in Twisted Double Bilayer Graphene
• Signatures of localization in the effective metallic regime of high mobility Si MOSFETs
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Cited by in corpus (13)

• Theory of shot noise in strange metals
• Moiré phonons in graphene/hexagonal boron nitride moiré superlattice
• Topological Mixed Valence Model for Twisted Bilayer Graphene
• Planckian properties of 2D semiconductor systems
• Extended linear-in-$T$ resistivity due to electron-phason scattering in moiré superlattices
• Theory of phonon spectroscopy with the quantum twisting microscope
• Plasmonic quantum nonlinear Hall effect in noncentrosymmetric 2D materials
• Acoustic phonon contribution to the resistivity of twisted bilayer graphene
• Phonon-limited resistivity of multilayer graphene systems
• Two-dimensional hydrodynamic electron flow through periodic and random potentials
• $T-$linear resistivity from magneto-elastic scattering: application to PdCrO${}_2$
• Quasiparticle and superfluid dynamics in Magic-Angle Graphene
• Role of many phonon modes on the high-temperature linear-in-$T$ electronic resistivity