Publications (9)
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 graph…
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 te…
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 angl…
Feedback Lock-in: A versatile multi-terminal measurement system for electrical transport devices
Arthur W. Barnard, Evgeny Mikheev, Joe Finney +2
We present the design and implementation of a measurement system that enables parallel drive and detection of small currents and voltages at numerous electrical contacts to a multi…
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.…