1.7k citations · 4.2k across the 25 of their papers we have counts for
25 papers
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,…
Fermiology and the Candidate Chiral Superconductor in Rhombohedral Tetralayer Graphene
Sandesh S. Kalantre, Ben H. Alexander, Julian May-Mann +11
Chiral superconductivity, in which the phase of the superconducting order parameter winds in momentum space, has long been sought for its close link to topological superconductivit…
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…
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…
Directional ballistic magnetotransport in the delafossite metals PdCoO and PtCoO
Michal Moravec, Graham Baker, Maja D. Bachmann +9
Studies of electronic transport in width-restricted channels of PdCoO have recently revealed a novel `directional ballistic' regime, in which ballistic propagation of electrons…
Extended Fractional Chern Insulators Near Half Flux in Twisted Bilayer Graphene Above the Magic Angle
Joe Finney, Aaron L. Sharpe, Linsey K. Rodenbach +7
Fractional Chern insulators (FCIs) -- the lattice analog of fractional quantum Hall states -- form as fractionalized quasiparticles emerge in a partially-filled Chern band. This fr…
Quantitative determination of twist angle and strain in Van der Waals moiré superlattices
Steven J. Tran, Jan-Lucas Uslu, Mihir Pendharkar +9
Scanning probe techniques are popular, non-destructive ways to visualize the real space structure of Van der Waals moirés. The high lateral spatial resolution provided by these tec…
Deterministic fabrication of graphene hexagonal boron nitride moiré superlattices
Rupini V. Kamat, Aaron L. Sharpe, Mihir Pendharkar +11
The electronic properties of moiré heterostructures depend sensitively on the relative orientation between layers of the stack. For example, near-magic-angle twisted bilayer graphe…
Automated Tabletop Exfoliation and Identification of Monolayer Graphene Flakes
Elijah D. S. Courtney, Mihir Pendharkar, Nathan J. Bittner +2
Over the past two decades, graphene has been intensively studied because of its remarkable mechanical, optical, and electronic properties. Initial studies were enabled by manual ``…
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…
Torsional Force Microscopy of Van der Waals Moirés and Atomic Lattices
Mihir Pendharkar, Steven J. Tran, Gregory Zaborski +13
In a stack of atomically-thin Van der Waals layers, introducing interlayer twist creates a moiré superlattice whose period is a function of twist angle. Changes in that twist angle…
Magnetic field stabilized Wigner crystal states in a graphene moiré superlattice
Guorui Chen, Ya-Hui Zhang, Aaron Sharpe +11
Wigner crystals are predicted as the crystallization of the dilute electron gas moving in a uniform background when the electron-electron Coulomb energy dominates the kinetic energ…
Unusual magnetotransport in twisted bilayer graphene from strain-induced open Fermi surfaces
Xiaoyu Wang, Joe Finney, Aaron L. Sharpe +7
Anisotropic hopping in a toy Hofstadter model was recently invoked to explain a rich and surprising Landau spectrum measured in twisted bilayer graphene away from the magic angle.…
Unusual magnetotransport in twisted bilayer graphene
Joe Finney, Aaron L. Sharpe, Eli J. Fox +10
We present transport measurements of bilayer graphene with 1.38° interlayer twist and apparent additional alignment to its hexagonal boron nitride cladding. As with other devices w…
Directional ballistic transport in the two-dimensional metal PdCoO2
Maja D. Bachmann, Aaron L. Sharpe, Arthur W. Barnard +8
In an idealized infinite crystal, the material properties are constrained by the symmetries of its unit cell. Naturally, the point-group symmetry is broken by the sample shape of a…
Evidence of orbital ferromagnetism in twisted bilayer graphene aligned to hexagonal boron nitride
Aaron L. Sharpe, Eli J. Fox, Arthur W. Barnard +5
We have previously reported ferromagnetism evinced by a large hysteretic anomalous Hall effect in twisted bilayer graphene (tBLG). Subsequent measurements of a quantized Hall resis…
Tunable ferromagnetism at non-integer filling of a moiré superlattice
Guorui Chen, Aaron L. Sharpe, Eli J. Fox +12
The flat bands resulting from moiré superlattices in magic-angle twisted bilayer graphene (MATBG) and ABC-trilayer graphene aligned with hexagonal boron nitride (ABC-TLG/hBN) have…
Tunable Correlated Chern Insulator and Ferromagnetism in Trilayer Graphene/Boron Nitride Moiré Superlattice
Guorui Chen, Aaron L. Sharpe, Eli J. Fox +12
Studies on two-dimensional electron systems in a strong magnetic field first revealed the quantum Hall (QH) effect, a topological state of matter featuring a finite Chern number (C…
Super-geometric electron focusing on the hexagonal Fermi surface of PdCoO
Maja D. Bachmann, Aaron L. Sharpe, Arthur W. Barnard +6
Geometric electron optics may be implemented in solid state when transport is ballistic on the length scale of a device. Currently, this is realized mainly in 2D materials characte…
Signatures of Gate-Tunable Superconductivity in Trilayer Graphene/Boron Nitride Moiré Superlattice
Guorui Chen, Aaron L. Sharpe, Patrick Gallagher +12
Understanding the mechanism of high temperature (high Tc) superconductivity is a central problem in condensed matter physics. It is often speculated that high Tc superconductivity…
Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
Aaron L. Sharpe, Eli J. Fox, Arthur W. Barnard +5
When two sheets of graphene are stacked at a small twist angle, the resulting flat superlattice minibands are expected to strongly enhance electron-electron interactions. Here we p…