Emergent electronic phenomena in iron-based superconductors have been at the forefront
of condensed matter physics for more than a decade. Much has been learned about the …

We analyze superconductivity in a multi-orbital fermionic system near the onset of a nematic
order, using doped FeSe as an example. We associate nematicity with spontaneous …

In the magic-angle twisted bilayer graphene (MATBG), one of the most remarkable
observations is the C 3-symmetry-breaking nematic state. We identify that the nematicity in …

Unconventional symmetry breaking due to nonlocal order parameters has attracted
considerable attention in many strongly correlated metals. Famous examples are the …

In this article, we review the recent significant progress in the theoretical studies of the
electronic states by mainly focusing on Fe-based and cuprate superconductors. These …

High-resolution time-and angle-resolved photoemission measurements were made on FeSe
superconductors. With ultrafast photoexcitation, two critical excitation fluences that …

The origin of diverse nematicity and their order parameters in Fe-based superconductors
have been attracting increasing attention. Recently, a new type of nematic order has been …

Recently discovered superconducting infinite-layer nickelates R NiO 2 (R= Nd, La, Pr)
attracts increasing attention as a similar system to cuprates. Both R NiO 2 and YBCO …

Unconventional symmetry-breaking phenomena due to nontrivial order parameters attract
increasing attention in strongly correlated electron systems. Here, we predict theoretically …

Spontaneous current orders due to odd-parity order parameters have attracted increasing
attention in various strongly correlated metals. we discover a spin-fluctuation-driven charge …