Non-Hermitian (NH) Hamiltonians have become an important asset for the effective
description of various physical systems that are subject to dissipation. Motivated by recent …

The generic nature of band touching points in three-dimensional band structures is at the
heart of the rich phenomenology, topological stability, and novel Fermi arc surface states …

We study the interplay of disorder and band-structure topology in a Weyl semimetal with a
tilted conical spectrum around the Weyl points. The spectrum of particles is given by the …

We consider the impact of disorder on the spectrum of three-dimensional nodal-line
semimetals. We show that the combination of disorder and a tilted spectrum naturally leads …

We demonstrate the existence of topologically stable unpaired exceptional points (EPs), and
construct simple non-Hermitian (NH) tight-binding models exemplifying such remarkable …

A non-Hermitian system can exhibit extensive sensitivity of its complex energy spectrum to
the imposed boundary conditions, which is beyond any known phenomenon from Hermitian …

The fermion doubling theorem plays a pivotal role in Hermitian topological materials. It
states, for example, that Weyl points must come in pairs in three-dimensional semimetals …

Recently, topological quantum states of non-Hermitian systems, exhibiting rich, new exotic
states, have attracted great attention in condensed-matter physics. As for the demonstration …

We study non-Hermitian higher-order Weyl semimetals (NHHOWSMs) possessing real
spectra and having inversion I (I-NHHOWSM) or time-reversal symmetry T (T-NHHOWSM) …

This work unveils how geometric features of two-band non-Hermitian Hamiltonians can
classify the topology of their eigenstates and energy manifolds. Our approach generalizes …