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Quantum effects for the 2D soliton in isotropic ferromagnets | | Boris A. Ivanov
; Denis D. Sheka
; Vasilii V. Krivonos
; Franz G. Mertens
; | | Date: |
6 Dec 2006 | | Subject: | Strongly Correlated Electrons | | Abstract: | We evaluate a zero-point quantum correction to a Belavin-Polyakov soliton in an isotropic 2D ferromagnet. By revising the scattering problem of quasi-particles by a soliton we show that it leads to the Aharonov-Bohm type of scattering, hence the scattering data can not be obtained by the Born approximation. We proof that the soliton energy with account of quantum corrections does not have a minimum as a function of its radius, which is usually interpreted as a soliton instability. On the other hand, we show that long lifetime solitons can exist in ferromagnets due to an additional integral of motion, which is absent for the sigma-model. | | Source: | arXiv, cond-mat/0612152 | | Services: | Forum | Review | PDF | Favorites | |
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