Topological considerations show that thin films of $^{3}\mathit{A}$ might support skyrmions. These are topological excitations in the spin part of the order parameter. By deriving an approximation to the solitonic free energy that is exact for both small and large sizes we show that the skyrmions are unstable against collapse.Topological considerations show that thin films of $^{3}\mathit{A}$ might support skyrmions. These are topological excitations in the spin part of the order parameter. By deriving an approximation to the solitonic free energy that is exact for both small and large sizes we show that the skyrmions are unstable against collapse.

Physical review. B, Condensed matterSep 1, 19930 citations

Topological considerations show that thin films of

^{3}\mathit{A}

might support skyrmions. These are topological excitations in the spin part of the order parameter. By deriving an approximation to the solitonic free energy that is exact for both small and large sizes we show that the skyrmions are unstable against collapse.