Wannier charge center, spin resolved bulk polarization, and corner modes in a strained quantum spin Hall insulator

S Lahiri, S Basu - Physical Review B, 2024 - APS
Topological invariants are a significant ingredient in the study of topological phases of
matter that intertwines the supposedly contradicting concepts of bulk and boundary. The …

Crystalline electromagnetic responses of higher-order topological semimetals

MR Hirsbrunner, AD Gray, TL Hughes - Physical Review B, 2024 - APS
Previous work has shown that time-reversal symmetric Weyl semimetals with a quadrupolar
arrangement of first-order Weyl nodes exhibit a mixed crystalline-electromagnetic response …

Floquet exceptional topological insulator

GK Dash, S Bid, M Thakurathi - Physical Review B, 2024 - APS
We propose a novel way of modulating exceptional topology by implementing Floquet
engineering in non-Hermitian (NH) systems. We introduce Floquet exceptional topological …

Role of Non-Hermiticity in d-wave Altermagnet

GK Dash, S Panda, S Nandy - arXiv preprint arXiv:2408.08297, 2024 - arxiv.org
We develop non-Hermitian counterpart of a new class of collinear magnets, dubbed
altermagnets, delineated by net zero magnetization with momentum-dependent spin …