10 papers
Charge density-waves with non-trivial orbital textures in rare earth tritellurides
Sergey Alekseev, Sayed Ali Akbar Ghorashi, Rafael M. Fernandes +1
Motivated by recent experiments reporting unconventional collective modes in the charge density-wave (CDW) state of rare-earth tritellurides Te, we derive from a multi-orbit…
Higher-Order Nodal Hinge States in Doped Superconducting Topological Insulator
Sayed Ali Akbar Ghorashi, Jennifer Cano, Enrico Rossi +1
Doped strong topological insulators are one of the most promising candidates to realize a fully gapped three-dimensional topological superconductor (TSC). In this letter, we revisi…
Non-Hermitian Higher-Order Weyl Semimetals
Sayed Ali Akbar Ghorashi, Tianhe Li, Masatoshi Sato
We study non-Hermitian higher-order Weyl semimetals (NHHOWSMs) possessing real spectra and having inversion (-NHHOWSM) or time-reversal symmetry $\mathca…
Non-Hermitian Higher-Order Dirac Semimetals
Sayed Ali Akbar Ghorashi, Tianhe Li, Masatoshi Sato +1
In this article we study 3D non-Hermitian higher-order Dirac semimetals (NHHODSMs). Our focus is on -symmetric non-Hermitian systems where we investigate inversion ($\mathcal{…
Higher-order Weyl Semimetals
Sayed Ali Akbar Ghorashi, Tianhe Li, Taylor L. Hughes
We investigate higher-order Weyl semimetals (HOWSMs) having bulk Weyl nodes attached to both surface and hinge Fermi arcs. We identify a new type of Weyl node, that we dub a …
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…