572 citations · 4.1k across the 73 of their papers we have counts for
30 papers · 1 filter
Nature of the bosonic edge phase in a double quantum spin Hall insulator
Andreas Feuerpfeil, Ronny Thomale, Trithep Devakul +2
Field-theoretic analysis has predicted that the edge of a double quantum spin Hall insulator (DQSHI) can undergo an interaction-driven transition from a phase with fermionic edge m…
Quantized Transport through a Supermoiré Chern Mosaic
Li-Qiao Xia, Aviram Uri, Zachary W. Gomez +8
Magic-angle helical trilayer graphene---three graphene layers sequentially twisted in the same direction by ---relaxes into a mosaic of domains that, at zero field,…
Skyrmion Fractional Chern Insulator: An Intrinsically Multiband Route to Fractionalization in Rhombohedral Graphene
Julian May-Mann, Tixuan Tan, Patrick J. Ledwith +2
We propose an unconventional microscopic origin for the fractional quantum anomalous Hall (FQAH) effect in rhombohedral graphene moiré superlattices: skyrmion fractionalization. We…
Visualizing orbital magnetism in electron doped rhombohedral multilayer graphene
Owen I. Sheekey, Trevor B. Arp, Benjamin A. Foutty +24
Electron doped rhombohedral multilayer graphene at high displacement field features an exceptionally flat band minimum with near-ideal quantum geometry. Experiments in this regime…
Mesoscopic transport in a Chern mosaic
Sayak Bhattacharjee, Julian May-Mann, Yves H. Kwan +2
We analyze mesoscopic electronic transport in a Chern mosaic: a regular pattern of domains whose electronic bands carry differing local Chern numbers. An example platform where a C…
Electrically controllable valence-conduction band reversals in helical trilayer graphene
Matan Bocarsly, Indranil Roy, Weifeng Zhi +11
In moiré graphene systems, electronic interactions lift spin and valley degeneracies, leading to symmetry-broken ground states. In helical trilayer graphene (HTG), we uncover a dis…
The ideal limit of rhombohedral graphene: Dynamical skyrmion lattices and their excitations
Tixuan Tan, Patrick J. Ledwith, Trithep Devakul
We introduce an interacting ideal limit of rhombohedral graphene in which interactions spontaneously generate a correlated Chern insulator. Our analysis reveals that this Chern ins…
Nonvolatile Switching of Magnetism via Gate-Induced Sliding in Tetralayer Graphene
Daniel Brandon, Tixuan Tan, Yiwen Ai +7
Interlayer sliding degrees of freedom often determine the physical properties of two-dimensional (2D) materials. In graphene, for instance, the metastable rhombohedral stacking arr…
Magic continuum in multi-moiré twisted trilayer graphene
Li-Qiao Xia, Aviram Uri, Jiaojie Yan +10
Moiré lattices provide a highly tunable platform for exploring the interplay between electronic correlations and band topology. Introducing a second moiré pattern extends this para…
Link between thermodynamic correlation signatures and superconductivity in twisted trilayer graphene
Jesse C. Hoke, Yifan Li, Yuwen Hu +6
Twisted graphene multilayers exhibit strong electronic correlations, which manifest in a range of experimental signatures. Yet how these signatures relate to each other and the mic…
Shot noise in strongly correlated double quantum spin Hall edges
Andreas Tsantilas, Trithep Devakul, Julian May-Mann
We consider the effects of interactions on the edges of ``double" quantum spin Hall insulators (DQSHIs), motivated by recent experiments on moiré twisted metal dichalcogenides. Wit…
Magnetic Hofstadter cascade in a twisted semiconductor homobilayer
Benjamin A. Foutty, Aidan P. Reddy, Carlos R. Kometter +4
Transition metal dichalcogenide moiré homobilayers have emerged as a platform in which magnetism, strong correlations, and topology are intertwined. In a large magnetic field, the…
Imaging supermoiré relaxation in helical trilayer graphene
Jesse C. Hoke, Yifan Li, Yuwen Hu +5
In twisted van der Waals materials, local atomic relaxation can alter the underlying electronic structure. Characterizing lattice reconstruction and its susceptibility to strain is…
Wavefunction approach to the fractional anomalous Hall crystal
Tixuan Tan, Julian May-Mann, Trithep Devakul
We propose fractional anomalous Hall crystals (FAHCs) as possible ground states of strongly interacting electrons in parent bands with Berry curvature. FAHCs are exotic states of m…
Theory of Half-Integer Fractional Quantum Spin Hall Insulator Edges
Julian May-Mann, Ady Stern, Trithep Devakul
We study the edges of fractional quantum spin Hall insulators (FQSH) with half-integer spin Hall conductance. These states can be viewed as symmetric combinations of a spin-up and…
Parent Berry curvature and the ideal anomalous Hall crystal
Tixuan Tan, Trithep Devakul
We study a model of electrons moving in a parent band of uniform Berry curvature. At sufficiently high parent Berry curvature, we show that strong repulsive interactions genericall…
Wigner Molecular Crystals from Multi-electron Moiré Artificial Atoms
Hongyuan Li, Ziyu Xiang, Aidan P. Reddy +10
Semiconductor moiré superlattices provide a versatile platform to engineer new quantum solids composed of artificial atoms on moiré sites. Previous studies have mostly focused on t…
Helical trilayer graphene: a moiré platform for strongly-interacting topological bands
Li-Qiao Xia, Sergio C. de la Barrera, Aviram Uri +9
Quantum geometry of electronic wavefunctions results in fascinating topological phenomena. A prominent example is the intrinsic anomalous Hall effect (AHE) in which a Hall voltage…
Electronic ratchet effect in a moiré system: signatures of excitonic ferroelectricity
Zhiren Zheng, Xueqiao Wang, Ziyan Zhu +17
Electronic ferroelectricity represents a new paradigm where spontaneous symmetry breaking driven by electronic correlations, in contrast to traditional lattice-driven ferroelectric…
Fractional quantum anomalous Hall states in twisted bilayer MoTe and WSe
Aidan P. Reddy, Faisal F. Alsallom, Yang Zhang +2
We demonstrate via exact diagonalization that AA-stacked TMD homobilayers host fractional quantum anomalous Hall (FQAH) states with fractionally quantized Hall conductance at fract…
Mapping twist-tuned multiband topology in bilayer WSe
Benjamin A. Foutty, Carlos R. Kometter, Trithep Devakul +5
Semiconductor moiré superlattices have been shown to host a wide array of interaction-driven ground states. However, twisted homobilayers have been difficult to study in the limit…
Superconductivity and strong interactions in a tunable moiré quasiperiodic crystal
Aviram Uri, Sergio C. de la Barrera, Mallika T. Randeria +10
Electronic states in quasiperiodic crystals generally preclude a Bloch description, rendering them simultaneously fascinating and enigmatic. Owing to their complexity and relative…
Artificial atoms, Wigner molecules, and emergent Kagome lattice in semiconductor moiré superlattices
Aidan P. Reddy, Trithep Devakul, Liang Fu
Semiconductor moiré superlattices comprise an array of artificial atoms and provide a highly tunable platform for exploring novel electronic phases. We introduce a theoretical fram…
Hofstadter states and reentrant charge order in a semiconductor moiré lattice
Carlos R. Kometter, Jiachen Yu, Trithep Devakul +7
The emergence of moiré materials with flat bands provides a platform to systematically investigate and precisely control correlated electronic phases. Here, we report local electro…