1.7k citations · 2.5k across the 12 of their papers we have counts for
13 papers
All-Dielectric Metasurface with a Two-Dimensional Locally Flat Photonic Band
Minho Choi, Christopher Munley, Virat Tara +4
Photonic flatbands offer promising light-matter interaction due to their unique slow-light nature. In recent years, flatbands have also attracted significant interest in optical en…
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…
Visible Wavelength Flatband in a Gallium Phosphide Metasurface
Christopher Munley, Arnab Manna, David Sharp +6
Engineering the dispersion of light in a metasurface allows for controlling the light-matter interaction strength between light confined in the metasurface and materials placed wit…
Microwave-frequency scanning gate microscopy of a Si/SiGe double quantum dot
Artem O. Denisov, Seong W. Oh, Gordian Fuchs +6
Conventional quantum transport methods can provide quantitative information on spin, orbital, and valley states in quantum dots, but often lack spatial resolution. Scanning tunneli…
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…
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…
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…
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…
Absorptive pinhole collimators for ballistic Dirac fermions in graphene
Arthur W. Barnard, Alex Hughes, Aaron L. Sharpe +3
Ballistic electrons in solids can have mean free paths far larger than the smallest features patterned by lithography. This has allowed development and study of solid-state electro…
Synchronization of Micromechanical Oscillators Using Light
Mian Zhang, Gustavo Wiederhecker, Sasikanth Manipatruni +3
Synchronization, the emergence of spontaneous order in coupled systems, is of fundamental importance in both physical and biological systems. We demonstrate the synchronization of…
Entropic Spectral Broadening in Carbon Nanotube Resonators
Arthur W. Barnard, Vera Sazonova, Arend M. van der Zande +1
We simulated the behavior of suspended carbon-nanotube (CNT) resonators over a broad range of temperatures to address the unexplained spectral broadening and frequency shifts seen…
Planet Migration and Disk Destruction due to Magneto-Centrifugal Stellar Winds
R. V. E. Lovelace, M. M. Romanova, A. W. Barnard
This paper investigates the influence of magneto-centrifugally driven or simply magnetic winds of rapidly-rotating, strongly-magnetized T Tauri stars in causing the inward or outwa…