We study the Hatano-Nelson model, ie, a one-dimensional non-Hermitian chain of spinless
fermions with nearest-neighbor nonreciprocal hopping, in the presence of repulsive nearest …

The search of topological states in non-Hermitian systems has gained a strong momentum
over the last two years climbing to the level of an emergent research front. In this perspective …

Non-Hermiticity can alter the topological properties of energy bands and drive topologically
trivial systems with Hermitian limits to generate nontrivial topological edge states …

Higher-order topological insulators exhibit clear hierarchical boundary states, providing an
amazing platform for robust wave manipulations in mechanical or acoustic systems …

Scale-free localization in non-Hermitian systems is a distinctive type of localization where
the localization length of certain eigenstates, known as scale-free localized (SFL) states …

A one-dimensional metamaterial with parity-time (PT) symmetry that relies on balanced gain
and loss is introduced, comprising magnetically coupled split-ring resonators (SRRs). A …

Localization properties of eigenstates change according to the lattice model. A Hatano-
Nelson model with asymmetric hopping constants exhibit non-Hermitian skin effect (NHSE) …

We study parity-time (PT) phase transitions in the energy spectra of ladder lattices caused by
the interplay between nonorientability and non-Hermitian PT symmetry. The energy spectra …

We study parity-time (PT) phase transitions in the energy spectra of ladder lattices caused by
the interplay between non-orientability and non-Hermitian PT symmetry. The energy spectra …