Twisted van der Waals (vdW) quantum materials have emerged as a rapidly developing field
of two-dimensional (2D) semiconductors. These materials establish a new central research …

The Berry curvature and quantum metric are the imaginary part and real part, respectively, of
the quantum geometric tensor, which characterizes the topology of quantum states. The …

Quantum geometry in condensed-matter physics has two components: the real part quantum
metric and the imaginary part Berry curvature. Whereas the effects of Berry curvature have …

Berry curvature physics and quantum geometric effects have been instrumental in
advancing topological condensed matter physics in recent decades. Although Landau level …

Van der Waals dielectrics are fundamental materials for condensed matter physics and
advanced electronic applications. Most dielectrics host isotropic structures in crystalline or …

Three mechanisms are known to contribute to second-order nonlinear current: Extrinsic
nonlinear Drude, Berry curvature dipole, and intrinsic Berry connection polarizability. Here …

Berry curvature dipole plays an important role in various nonlinear quantum phenomena.
However, the maximum symmetry allowed for nonzero Berry curvature dipole in the …

It has been theoretically predicted that perturbation of the Berry curvature by electromagnetic
fields gives rise to intrinsic nonlinear anomalous Hall effects that are independent of …

We provide a theoretical interpretation of the metallic broken spin-valley (flavor) symmetry
states recently discovered in hole-doped rhombohedral trilayer (ABC) graphene in large …

The valley Hall effect arises from valley-contrasting Berry curvature and requires inversion
symmetry breaking. Here, we propose a nonlinear mechanism to generate a valley Hall …