We show that finite current in superconductors can induce topological phase transitions, as
a result of the deformation of the quasiparticle spectrum by a finite center-of-mass (COM) …

The triangular lattice Hubbard model at strong coupling, whose effective spin model
contains both Heisenberg and ring exchange interactions, exhibits a rich phase diagram as …

Highly entangled excitations such as Majorana fermions of Kitaev quantum spin liquids have
been proposed to be utilized for future quantum science and technology, and a deeper …

The study of nonequilibrium phenomena in interacting lattice systems can provide new
perspectives on correlation effects, and information on metastable states of matter. Mott …

Magnetic anisotropies often originate from the spin-orbit coupling and determine magnetic
ordering patterns. We develop a microscopic theory for dc electric-field controls of magnetic …

We study electric polarization and nonlinear optical effects in spin systems with broken
inversion symmetry. We apply strong-coupling expansion to the underlying electronic …

In this paper, we propose an approach to manipulate a translation-invariant single-band
tight-binding system beyond nearest-neighbor coupling. By using a sequence of multiple …

We investigate the magnetism in tilted fermionic Mott insulators. With a small tilt, the fermions
are still localized and form a Mott-insulating state, where the localized spins interact via …