Merons which are topologically equivalent to one-half of skyrmions can exist only in pairs or
groups in two-dimensional (2D) ferromagnetic (FM) systems. The recent discovery of meron …

Skyrmion-based spin torque nano-oscillators are potential next-generation microwave
signal generators. However, ferromagnetic skyrmion-based spin torque nano-oscillators …

The manipulation of charge and lattice degrees of freedom in atomically precise, low‐
dimensional ferroelectric superlattices can lead to exotic polar structures, such as a vortex …

The oscillation frequency of the circular skyrmion motion in a nanodisk increases with the
driving current density. However, the skyrmion may be destroyed at the nanodisk edge when …

We present an experimental study of spin-torque driven vortex self-oscillations in magnetic
nanocontacts. We find that, above a certain threshold in applied currents, the vortex gyration …

A skyrmion can be stabilized in a nanodisk geometry in a ferromagnetic material with
Dzyaloshinskii-Moriya (DM) interaction. We apply spin torque uniform in space and time and …

We present an overview in the understanding of spin-transfer torque (STT) induced
magnetization dynamics in spin-torque nano-oscillator (STNO) devices. The STNO contains …

Nanoscale oscillators based on the spin-transfer torque effect are attractive candidates for
the hardware implementation of neural networks using an array of coupled oscillators. Here …

Atomistic first-principles-based effective Hamiltonian simulations are conducted in some
ferroelectric systems to predict the existence of a novel topological state. Such state is …

Materials with spatial-reversal broken symmetry such as ferroelectrics rarely exhibit
topological field patterns, in contrast to time-reversal broken symmetry materials. Recently …