Higher-order topology realizes topologically robust corner modes as a manifestation of
nontriviality. We theoretically propose non-Hermitian skin effects which stem from the …

One-dimensional helical liquids can appear at boundaries of certain condensed matter
systems. Two prime examples are the edge of a quantum spin Hall insulator and the hinge …

The skin effect and topological edge states in non-Hermitian systems have been well
studied, and the second-order skin effect and corner modes have also been proposed in …

In this paper, we derive a general formula for the quantized fractional corner charge in two-
dimensional C n-symmetric higher-order topological insulators. We assume that the …

Although the non-Bloch band theory is a milestone in elaborating bulk energy bands of non-
Hermitian systems under the open-boundary condition (OBC), vital issues related to …

We theoretically investigate a periodically driven semimetal based on a square lattice. The
possibility of engineering both a Floquet topological insulator featuring Floquet edge states …

We explore the topological properties of a modified Haldane model (MHM) in which the
strength of the nearest-neighbor and next-nearest-neighbor hopping terms is made unequal …

The understanding and manipulate of the second‐order corner states are central to both
fundamental physics and future topotronics applications. Despite the fact that numerous …

We propose an unconventional bulk-edge correspondence for two-dimensional Stiefel-
Whitney insulators and Euler insulators, which are topological insulators protected by the PT …

We show that a slab of a three-dimensional inversion-symmetric higher-order topological
insulator (HOTI) in class A is a 2D Chern insulator, and that in class AII is a 2D Z 2 …