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Chapter
Non-Linear Excitations in Haldane Spin Chains
The concept of magnetism in one-dimension (1D) was considered initially as purely theoretical. The idea was to study simple models so as to find reliable solutions, which could apply or be extended to more com...
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Chapter and Conference Paper
Free vortices in the quasi-two dimensional XY antiferromagnet BaNl2(PO4)2?
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Chapter and Conference Paper
Critical fluctuations in the 2D XY antiferromagnet BaNi2(PO4)2 : NMR measurements
Non-linear excitations are known to play a crucial role in low-dimensional magnetism. For the two-dimensional (2D) XY model these non-linear excitations are described in terms of vortices which govern the so-c...