18 citations · 42 across the 7 of their papers we have counts for
8 papers
Disorder-driven stochastic dynamics in Mott resistive-switching systems
David J. Alspaugh, Lorenzo Fratino, Nareg Ghazikhanian +2
Controlled disorder in correlated materials provides a new route to emergent stochastic dynamics in neuromorphic hardware. Here we show that focused ion beam irradiation in VO$_{2}…
Enhanced stochasticity in irradiated vanadium oxide oscillators
Nareg Ghazikhanian, David J. Alspaugh, Pavel Salev +3
Insulator-to-metal transition materials are highly sensitive to even minute deviations of stoichiometry, lattice defects, and disorder, which provides opportunities to engineer the…
Effective models for dense vortex lattices in the Kitaev honeycomb model
David J. Alspaugh, Jean-Noël Fuchs, Anna Ritz-Zwilling +1
We introduce low-energy effective models for dense configurations of vortices in the Kitaev honeycomb model. Specifically, we consider configurations of vortices in which vortex-fr…
Local density of state oscillations in laterally heterostructured topological insulator-semiconductor systems
David J. Alspaugh, D. N. Sheng, Mahmoud M. Asmar
We study local density of state (LDOS) oscillations arising from the scattering of electrons at atomic edge defects in topological insulator (TI) surfaces. To create edge scatterin…
Andreev spectroscopy of nonhelical spin textures in topological insulators
David J. Alspaugh, Mahmoud M. Asmar, Daniel E. Sheehy +1
We study how nonhelical spin textures affect the proximity-induced superconductivity of topological insulator (TI)-superconductor (SC) interface states. In particular we calculate…
Probing the chirality of 1D Majorana edge states around a 2D nanoflake in a superconductor
Andrzej Ptok, David J. Alspaugh, Szczepan Głodzik +4
The interplay between superconductivity, magnetic field and spin-orbit coupling can lead to the realization of non--trivial topological phases. Recent experiments have found signat…
Volkov-Pankratov states in topological superconductors
David J. Alspaugh, Daniel E. Sheehy, Mark O. Goerbig +1
We study the in-gap states that appear at the boundaries of both 1D and 2D topological superconductors. While the massless Majorana quasiparticles are guaranteed to arise by the bu…
Proximity-Induced Superconductivity at Non-Helical Topological Insulator Interfaces
David J. Alspaugh, Mahmoud M. Asmar, Daniel E. Sheehy +1
We study how non-helical spin textures at the boundary between a topological insulator (TI) and a superconductor (SC) affect the proximity-induced superconductivity of the TI inter…