Colossal Layer Nernst Effect in Twisted Moiré Layers

Abstract

In this work, we establish a theoretical analysis of the emergence of layer-contrasted Nernst response perpendicular to the direction of the temperature gradient in twisted moiré layers, called layer Nernst effect (LNE). This phenomenon arises from the trigonal warping of the Fermi surface along with a layer-contrasted pseudomagnetic field. Interestingly, the Fermi surface's warping explicitly breaks intra-valley inversion symmetry, which leads to an imbalance between left- and right-moving carriers, thus resulting in a non-vanishing LNE. We then validate our theoretical scheme by applying it to twisted bilayer graphene (TBG). Importantly, we find that the LNE coefficient in TBG can reach values as high as $10^3$A/(m$\cdot$K), surpassing those of previously known materials by at least one order of magnitude. These results provide a theoretical foundation for utilizing TBG and other twisted moiré layers as promising platforms to explore layer caloritronics and develop thermoelectric devices.

arXiv comment6 pages, 4 figures

References in corpus (50)

• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
• Moire bands in twisted double-layer graphene
• Tuning superconductivity in twisted bilayer graphene
• Universal Intrinsic Spin-Hall Effect
• Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
• Intrinsic quantized anomalous Hall effect in a moiré heterostructure
• Origin of Magic Angles in Twisted Bilayer Graphene
• Topological insulators in twisted transition metal dichalcogenide homobilayers
• Large anomalous Nernst effect at room temperature in a chiral antiferromagnet
• Berry phase effect in anomalous thermoelectric transport
• Spin-polarized Correlated Insulator and Superconductor in Twisted Double Bilayer Graphene
• Universal Scaling Behavior of Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets
• Giant anomalous Nernst effect and quantum-critical scaling in a ferromagnetic semimetal
• Ultrafast collinear scattering and carrier multiplication in graphene
• Correlated states in twisted double bilayer graphene
• Monolayer MoS2: trigonal warping, "Γ-valley", and spin-orbit coupling effects
• Layer Hall effect in a 2D topological Axion antiferromagnet
• The thermopower and Nernst Effect in graphene in a magnetic field
• The pseudo-Landau-level representation of twisted bilayer graphene: band topology and the implications on the correlated insulating phase
• Theory of correlated insulating behaviour and spin-triplet superconductivity in twisted double bilayer graphene
• Nernst effect in metals and superconductors: a review of concepts and experiments
• Observation of the spin Nernst effect
• Berry curvature dipole senses topological transition in a moiré superlattice
• Giant anomalous Nernst effect in the magnetic Weyl semimetal Co3Sn2S2
• Giant Orbital Magneto-electric effect and Current-driven Magnetization Switching in Twisted Bilayer Graphene
• Lattice reconstruction induced multiple ultra-flat bands in twisted bilayer WSe2
• Giant nonlinear Hall effect in twisted WSe${}_2$
• Chiral Approximation to Twisted Bilayer Graphene: Exact Intra-Valley Inversion Symmetry, Nodal Structure and Implications for Higher Magic Angles
• Spin Nernst effect and Nernst effect in two-dimensional electron systems
• Higher-Order Nonlinear Anomalous Hall Effects Induced by Berry Curvature Multipoles
• Thermally driven pure spin and valley current via anomalous Nernst effect in monolayer group-VI dichalcogenides
• Scattering-Independent Anomalous Nernst Effect in Ferromagnets
• Nonlinear transport in Weyl semimetals induced by Berry curvature dipole
• Seebeck Coefficient of a Single van der Waals Junction in Twisted Bilayer Graphene
• Tunable large Berry dipole in strained twisted bilayer graphene
• Topological Nonlinear Anomalous Nersnt Effect in Strained Transition Metal Dichalcogenides
• Giant nonlinear Hall effect in strained twisted bilayer graphene
• Intrinsic nonlinear Hall effect and gate-switchable Berry curvature sliding in twisted bilayer graphene
• Magnon-induced Giant Anomalous Nernst Effect in Single Crystal MnBi
• Non-linear Nernst effect in bilayer WTe${}_2$
• The valley Nernst effect in WSe${}_2$
• Interaction driven giant thermopower in magic-angle twisted bilayer graphene
• Mis-orientation controlled cross-plane thermoelectricity in twisted bilayer graphene
• Enhanced anomalous Nernst effect in disordered Dirac and Weyl materials
• Nonlinear Hall Effects in Strained Twisted Bilayer WSe${}_2$
• Time-Reversal Even Charge Hall Effect from Twisted Interface Coupling
• Unconventional thermoelectric behaviors and enhancement of figure of merit in Rashba spintronic systems
• Tunable topological Nernst effect in 2D transition metal dichalcogenides
• Layer Hall counterflow as a model probe of magic-angle twisted bilayer graphene

Cited by in corpus (3)

• Twistronics and moiré superlattice physics in 2D transition metal dichalcogenides
• Prediction of a layer nonlinear Hall effect in bilayer nonmagnetic or antiferromagnetic systems
• Interlayer electric multipole Hall effect in twisted multilayers