Abstract
We study the effect of a nonmagnetic impurity inserted in a two-dimensional frustrated ferromagnet above its saturation magnetic field for arbitrary spin . We demonstrate that the ground state includes a magnetic vortex that is nucleated around the impurity over a finite range of magnetic field . Upon approaching the quantum critical point at , the radius of the magnetic vortex diverges as the magnetic correlation length: . These results are derived both for the lattice and in the continuum limit.
- Received 11 February 2016
DOI:https://doi.org/10.1103/PhysRevLett.116.187202
© 2016 American Physical Society