169 citations · 991 across the 32 of their papers we have counts for
4 papers · 1 filter
Hybrid Dispersion Dirac semimetal and Hybrid Weyl phases in Luttinger Semimetals: A dynamical approach
Sayed Ali Akbar Ghorashi
We show that hybrid Dirac and Weyl semimetals can be realized in a three-dimensional Luttinger semimetal with quadratic band touching (QBT). We illustrate this using periodic kicki…
Vortex and Surface Phase Transitions in Superconducting Higher-order Topological Insulators
Sayed Ali Akbar Ghorashi, Taylor L. Hughes, Enrico Rossi
Topological insulators (TIs) having intrinsic or proximity-coupled s-wave superconductivity host Majorana zero modes (MZMs) at the ends of vortex lines. The MZMs survive up to a cr…
Criticality Across the Energy Spectrum from Random, Artificial Gravitational Lensing in Two-Dimensional Dirac Superconductors
Sayed Ali Akbar Ghorashi, Jonas F. Karcher, Seth M. Davis +2
We numerically study weak, random, spatial velocity modulation ["quenched gravitational disorder" (QGD)] in two-dimensional massless Dirac materials. QGD couples to the spatial com…
Second-order Dirac superconductors and magnetic field induced Majorana hinge modes
Sayed Ali Akbar Ghorashi, Xiang Hu, Taylor L. Hughes +1
We identify three-dimensional higher-order superconductors characterized by the coexistence of one-dimensional Majorana hinge states and gapless surface sates. We show how such sup…