Low-temperature thermal transport in moiré superlattices
arXiv:2405.00406 · doi:10.7566/JPSJ.94.044602
Abstract
We calculate the phonon thermal conductivity of various moiré bilayer systems using a continuum approach and the semiclassical transport theory. When the twist angle is close to 0, we observe a significant reduction of thermal conductivity in a particular low-temperature regime. This reduction is attributed to a moiré-induced reconstruction of acoustic phonon bands and associated decrease of the group velocity. Conversely, in the zero temperature limit, the thermal conductivity is enhanced by moiré effect, surpassing the original values in non-moiré counterparts. These changes result in a characteristic temperature dependence which deviates from the quadratic behavior in intrinsic two-dimensional systems.
arXiv comment12 pages, 10 figures
References in corpus (44)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Thermal transport measurements of individual multiwalled nanotubes
- Moire bands in twisted double-layer graphene
- Hofstadter's butterfly in moire superlattices: A fractal quantum Hall effect
- Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
- Massive Dirac fermions and Hofstadter butterfly in a van der Waals heterostructure
- Graphene bilayer with a twist: electronic structure
- Dimensional crossover of thermal transport in few-layer graphene materials
- Observation of Van Hove singularities in twisted graphene layers
- Emergence of Superlattice Dirac Points in Graphene on Hexagonal Boron Nitride
- Thermal Properties of Isotopically Engineered Graphene
- Commensurate-incommensurate transition for graphene on hexagonal boron nitride
- Flat Bands in Slightly Twisted Bilayer Graphene
- Localization of Dirac electrons by Moire patterns in graphene bilayers
- Single Layer Behavior and Its Breakdown in Twisted Graphene Layers
- Lattice relaxation and energy band modulation in twisted bilayer graphenes
- Strange metal in magic-angle graphene with near Planckian dissipation
- Finite temperature lattice properties of graphene beyond the quasiharmonic approximation
- Atomic reconstruction in twisted bilayers of transition metal dichalcogenides
- Mapping the twist angle and unconventional Landau levels in magic angle graphene
- Phonon scattering dominated electron transport in twisted bilayer graphene
- Energy Spectrum and Quantum Hall Effect in Twisted Bilayer Graphene
- Origin of band gaps in graphene on hexagonal boron nitride
- Ballistic to diffusive crossover of heat flow in graphene ribbons
- Adhesion and electronic structure of graphene on hexagonal boron nitride substrates
- Relaxation and Domain Formation in Incommensurate 2D Heterostructures
- Stacking domains and dislocation networks in marginally twisted bilayers of transition metal dichalcogenides
- Phonon hydrodynamics and ultrahigh-room-temperature thermal conductivity in thin graphite
- Strong electron-phonon coupling, electron-hole asymmetry, and nonadiabaticity in magic-angle twisted bilayer graphene
- Spontaneous Strains and Gap in Graphene on Boron Nitride
- Commensurate-incommensurate phase transition in bilayer graphene
- Moiré phonons in the twisted bilayer graphene
- Raman-scattering study of the phonon dispersion in twisted bi-layer graphene
- Phonons in Twisted Transition Metal Dichalcogenide Bilayers ("Twistnonics"): Ultra-soft Phasons, and a transition from Superlubric to Pinned Phase
- Magic angle in thermal conductivity of twisted bilayer graphene
- Manipulating thermal conductivity through substrate coupling
- Measuring local moiré lattice heterogeneity of twisted bilayer graphene
- Symmetry Origin of Lattice Vibration Modes in Twisted Multilayer Graphene: Phasons vs Moiré Phonons
- Moiré disorder effect in twisted bilayer graphene
- Low-energy moiré phonons in twisted bilayer van der Waals heterostructures
- Lattice distortions, moiré phonons, and relaxed electronic band structures in magic-angle twisted bilayer graphene
- Moiré phonons and impact of electronic symmetry breaking in twisted trilayer graphene
- Moiré phonons in graphene/hexagonal boron nitride moiré superlattice