We review ground states and excitations of a quantum antiferromagnet on triangular and
other frustrated lattices. We pay special attention to the combined effects of magnetic field h …

Electron correlation and spin frustration are among the central issues in condensed matter
physics, and their interplay is expected to bring about exotic phases with both charge and …

A previously unknown rigid helical structure of zinc oxide consisting of a superlattice-
structured nanobelt was formed spontaneously in a vapor-solid growth process. Starting …

As liquids crystallize into solids on cooling, spins in magnets generally form periodic order.
However, three decades ago, it was theoretically proposed that spins on a triangular lattice …

In this article we review the effects of magnetic frustration in the stacked triangular lattice.
Frustration increases the degeneracy of the ground state, giving rise to different physics. In …

We study the Kondo Lattice and the Hubbard models on a triangular lattice. We find that at
the mean-field level, these rotationally invariant models naturally support a noncoplanar …

The notion of quantum spin-liquids (QSLs), antiferromagnets with quantum fluctuation-driven
disordered ground states, is now firmly established in one-dimensional (1D) spin systems as …

A phase diagram of the one-dimensional S= 1/2 frustrated ferromagnetic Heisenberg model
in a magnetic field is studied via a bosonization technique. Besides the ferromagnetic …

Motivated by the recent experimental progress on the strong spin-orbit-coupled rare-earth
triangular antiferromagnet, we analyze the highly anisotropic spin model that describes the …

Recent theoretical and experimental studies on the critical properties of frustrated
antiferromagnets with non-collinear spin order, including stacked-triangular …