title: Magnetic Vortex Induced by Nonmagnetic Impurity in Frustrated Magnets.
abstract: We study the effect of a nonmagnetic impurity inserted in a two-dimensional frustrated ferromagnet above its saturation magnetic field H_{sat} for arbitrary spin S. We demonstrate that the ground state includes a magnetic vortex that is nucleated around the impurity over a finite range of magnetic field H_{sat}≤H≤H_{sat}^{I}. Upon approaching the quantum critical point at H=H_{sat}, the radius of the magnetic vortex diverges as the magnetic correlation length: ξ∝1/sqrt[H-H_{sat}]. These results are derived both for the lattice and in the continuum limit.
authors.affiliation: Theoretical Division and CNLS, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Shi-Zeng
authors.initials: SZ
authors.lastname: Lin
authors.affiliation: Theoretical Division and CNLS, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.|Department of Physics, Hokkaido University, Sapporo 060-0810, Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Hayami
authors.affiliation: Theoretical Division and CNLS, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.|Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA.|Quantum Condensed Matter Division and Shull-Wollan Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors.forename: Cristian D
authors.initials: CD
authors.lastname: Batista