Nonlinear responses are actively studied as probes of topology and band geometric
properties of solids. Here, we show that second harmonic generation serves as a probe of …

The theory of the orbital Hall effect (OHE), a transverse flow of orbital angular momentum
(OAM) in response to an electric field, has concentrated on intrinsic mechanisms. Here …

The quantum kinetic framework provides a versatile method for investigating the dynamical
optical and transport currents of crystalline solids. In this paper, starting from the density …

Higher-dimensional topological phases play a key role in understanding the lower-
dimensional topological phases and the related topological responses through a …

We have investigated the Fano factor and shot noise theoretically in the confined region of
the potential well of zigzag graphene nanoribbon (ZGNR). We have found that the Fano …

There has been considerable interest in the nonlinear optical phenomenon in recent years,
particularly in two-dimensional materials. Here, we study the optical polarization quantities …

We study the surface state-dependent magneto-optical properties of an ultrathin Floquet
topological insulator (FTI) under the influence of an external perpendicular magnetic field in …

The Landauer formula provides a general scattering formulation of electrical conduction.
Despite its utility, it has been mainly applied to the linear-response regime, and a scattering …

A single layer of the 1 T′ phase of WTe 2 provides a rich platform for exotic physical
properties such as the nonlinear Hall effect and high-temperature quantum spin Hall …

Two-dimensional semi-Dirac materials, with quadratic dispersion in one direction and linear
dispersion in the orthogonal direction, provide a route to formation of the Chern-insulating …