Second harmonic generation (SHG) as an essential nonlinear optical effect, has gradually
shifted its research trend toward the integration and miniaturization of photonic and …

Over the past few years, Sr2IrO4, a single-layer member of the Ruddlesden–Popper series
iridates, has received much attention as a close analog of cuprate high-temperature …

The search for quantum states arising from the interplay between correlation, frustration and
topology is a central topic for condensed-matter physics. Recently discovered non-magnetic …

Phase transitions governed by spontaneous time reversal symmetry breaking (TRSB) have
long been sought in many quantum systems, including materials with anomalous Hall effect …

Abstract Effects of spin–orbit interactions in condensed matter are an important and rapidly
evolving topic. Strong competition between spin–orbit, on-site Coulomb and crystalline …

Colossal magnetoresistance (CMR) is an extraordinary enhancement of the electrical
conductivity in the presence of a magnetic field. It is conventionally associated with a field …

Recently, superconductivity with spontaneous time-reversal or parity symmetry breaking is
attracting much attention owing to its exotic properties, such as nontrivial topology and …

We present a microscopic theory of the orbital magnetic quadrupole moment density Q ij in
periodic crystals with combined time-reversal (T) and inversion (I) symmetry. We obtain a …

Spin nematic is a magnetic analogue of classical liquid crystals, a fourth state of matter
exhibiting characteristics of both liquid and solid,. Particularly intriguing is a valence-bond …

In many quantum materials, strong electron correlations lead to the emergence of new states
of matter. In particular, the study in the last decades of the complex phase diagram of high …