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7 papers · 2 filters
Transition from Antiferromagnetic to Quadrupole Order in a Modified Square Artificial Spin Ice
Ali Frotanpour, Lance E. DeLong
The results of a numerical study of an ordered substitution of a double-segment into the unit cell of square artificial spin ice are presented. Each pattern vertex has three magnet…
Time-reversal-broken Weyl semimetal in the Hofstadter regime
Faruk Abdulla, Ankur Das, Sumathi Rao +1
We study the phase diagram for a lattice model of a time-reversal-broken three-dimensional Weyl semimetal (WSM) in an orbital magnetic field with a flux of per unit cell…
Negative group velocity and Kelvin-like wake pattern
Eugene B. Kolomeisky, Jonathan Colen, Joseph P. Straley
Wake patterns due to a uniformly traveling source are a result of the resonant emission of the medium's collective excitations. When there exists a frequency range where such excit…
Dc Electrical Current Generated by Upstream Neutral Modes
Ankur Das, Sumathi Rao, Yuval Gefen +1
Quantum Hall phases are gapped in the bulk but support chiral edge modes, both charged and neutral. Here we consider a circuit where the path from the source of electric current to…
Weyl Semimetal Path to Valley Filtering in Graphene
Ahmed Khalifa, Ribhu K. Kaul, Efrat Shimshoni +2
We propose a device in which a sheet of graphene is coupled to a Weyl semimetal, allowing for the physical access to the study of tunneling from two-dimensional to three dimensiona…
Angular-Dependent Dynamic Response and Magnetization Reversal in Fibonacci-Distorted, Kagome Artificial Spin Ice
Ali Frotanpour, Justin Woods, Barry Farmer +2
We have measured the angular dependence of ferromagnetic resonance (FMR) spectra for Fibonacci-distorted, Kagome artificial spin ice (ASI). The number of strong modes in the FMR sp…