The spontaneous reduction of rotational symmetry in a crystalline solid driven by an
electronic mechanism is referred to as electronic nematicity. This phenomenon—initially …

Spin textures with nontrivial topology, such as vortices and skyrmions, have attracted
attention as a source of unconventional magnetic, transport, and optical phenomena …

We theoretically investigate multiple-Q spin textures, which are composed of superpositions
of spin density waves with different wave numbers, for an effective spin model of …

Several classes of materials manifest displacive phase transitions, including shape memory
alloys, many electronically correlated materials, superconductors, and ferroelectrics. Each of …

Electronic nematic order has been reported in a rich landscape of materials, encompassing
not only a range of intertwined correlated and topological phenomena but also different …

Electronically ordered states that break multiple symmetries can melt in multiple stages,
similarly to liquid crystals. In a partially melted phase, known as vestigial phase, a bilinear …

Effective models focused on pertinent low-energy degrees of freedom have substantially
contributed to our qualitative understanding of quantum materials. An iconic example, the …

The noncoplanar multiple-Q magnetic orderings are investigated on the basis of an effective
spin model with bilinear-biquadratic interactions in momentum space. By performing the …

We numerically investigate the stabilization mechanisms of skyrmion crystals under thermal
fluctuations and external magnetic field in itinerant centrosymmetric tetragonal magnets. By …

Multiple-Q states as represented by a magnetic skyrmion crystal and hedgehog crystal have
been extensively studied in recent years owing to their unconventional physical properties …