Uniaxial stress control of skyrmion phase

Uniaxial stress control of skyrmion phase

Magnetic skyrmions, swirling nanometric spin textures, have been attracting increasing attention by virtue of their potential applications for future memory technology and their emergent electromagnetism. Despite a variety of theoretical proposals oriented towards skyrmion-based electronics (that is, skyrmionics), few experiments have succeeded in creating, deleting and transferring skyrmions, ...

Skyrmion-skyrmion Scattering

We study the scattering of Skyrmions at low energy and large separation using the method proposed by Manton of truncation to a finite number of degree freedom. We calculate the induced metric on the manifold of the union of gradient flow curves, which for large separation, to first non-trivial order is parametrised by the variables of the product ansatz.

Birefringence measurements of the uniaxial-stress dependence of the incommensurate phase transition in K2SeO4.

Skyrmion Liquid Phase of the Quantum Ferromagnet in Two Dimensions

The two-dimensional quantum ferromagnet filled with a liquid of skyrmions is studied theoretically in the context of the quantum Hall effect near electronic filling factor ν = 1. A cross-over between the classical ferromagnetic phase at ν = 1 and a classical paramagnetic phase at ν 6= 1 is obtained, which is consistent with recent Knight-shift measurements. A new collective mode associated with...

Low energy Skyrmion-Skyrmion scattering.

We study the scattering of two Skyrmions at low energy and large separation. We use the method proposed by Manton for truncating the degrees of freedom of the system from in nite to a manageable nite number. This corresponds to identifying the manifold consisting of the union of the low energy critical points of the potential along with the gradient ow curves joining these together and by posit...