Moiré heterostructures as a condensed-matter quantum simulator
Dante M. Kennes,Dante M. Kennes,Martin Claassen,Lede Xian,Antoine Georges,Andrew J. Millis,James Hone,Cory Dean,Dimitri Basov,Abhay Pasupathy,Angel Rubio +10 more
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In this article, the authors explore the idea of adopting twisted van der Waals heterostructures as a quantum simulation platform that enables the study of strongly correlated physics and topology in quantum materials.Abstract:
Twisted van der Waals heterostructures have latterly received prominent attention for their many remarkable experimental properties and the promise that they hold for realizing elusive states of matter in the laboratory We propose that these systems can, in fact, be used as a robust quantum simulation platform that enables the study of strongly correlated physics and topology in quantum materials Among the features that make these materials a versatile toolbox are the tunability of their properties through readily accessible external parameters such as gating, straining, packing and twist angle; the feasibility to realize and control a large number of fundamental many-body quantum models relevant in the field of condensed-matter physics; and finally, the availability of experimental readout protocols that directly map their rich phase diagrams in and out of equilibrium This general framework makes it possible to robustly realize and functionalize new phases of matter in a modular fashion, thus broadening the landscape of accessible physics and holding promise for future technological applications Moire heterostructures have latterly captured the attention of condensed-matter physicists This Review Article explores the idea of adopting them as a quantum simulation platform that enables the study of strongly correlated physics and topology in quantum materialsread more
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Moiré exciton condensate: Nonlinear Dirac point, broken-symmetry Bloch waves, and unusual optical selection rules
TL;DR: In this paper , the authors studied the properties of moir´e exciton condensate within the mean-field theory, with special focus on the exciton-exciton interaction effect on the nonlinear Bloch band and Bloch waves of excitoncondensate in moir\'e potential.
Universal scaling near band-tuned metal-insulator phase transitions
TL;DR: In this article , a theory for band-tuned metal-insulator transitions based on the Kubo formalism is presented, which exhibits scaling of the resistivity curves, in the regime where $T\tau>1$ or $T \tau > 1$ where $\tau$ is the scattering time and $\mu$ the chemical potential.
Magnetic excitations, phase diagram, and order-by-disorder in the extended triangular-lattice Hubbard model
TL;DR: In this article , the magnetic excitations of the triangular lattice Hubbard model including next-nearest neighbor hopping were studied and the magnon spectra were computed within a self-consistent random phase approximation.
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3/2 magic angle quantization rule of flat bands in twisted bilayer graphene and its relationship to the quantum Hall effect
TL;DR: In this paper , it was shown that for high-order magic angles, the zero flat band modes converge into coherent Landau states with a dispersion of π 2 = 1/3 π π + 1 − π − ε, where π is a coupling parameter that incorporates the twist angle and energetic scales.
General scatterings and electronic states in the quantum-wire network of moir\'e systems
TL;DR: In this paper , the authors investigate electronic states in a two-dimensional network consisting of interacting quantum wires, a model adopted for twisted bilayer systems and construct general operators which describe various scattering processes in the system.
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