Skyrmion Liquid Phase of the Quantum Ferromagnet in Two Dimensions

Details Skyrmion Liquid Phase of the Quantum Ferromagnet in Two Dimensions Skyrmion Liquid Phase of the Quantum Ferromagnet in Two Dimensions

1996-11-20

arxiv.org/abs/cond-mat/9611152v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pgs PLAIN TeX, 2 ps figs, to appear in Europhysics Letters

Scientific paper

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 $\nu = 1$. A cross-over between the classical ferromagnetic phase at $\nu =1$ and a classical paramagnetic phase at $\nu \neq 1$ is obtained, which is consistent with recent Knight-shift measurements. A new collective mode associated with the skyrmion liquid that is of the cyclotron type is also identified.

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