Heisenberg Spins on a Cylinder Section

Details Heisenberg Spins on a Cylinder Section Heisenberg Spins on a Cylinder Section

1999-09-07

arxiv.org/abs/cond-mat/9909095v2

Internat. J. Modern Phys. B 14 (2000) p2093

Physics

Condensed Matter

4 pages + 1 figure; REVTeX3

Scientific paper

10.1142/S0217979200001242

Classical Heisenberg spins in the continuum limit (i.e. the nonlinear sigma-model) are studied on an elastic cylinder section with homogeneous boundary conditions. The latter may serve as a physical realization of magnetically coated microtubules and cylindrical membranes. The corresponding rigid cylinder model exhibits topological soliton configurations with geometrical frustration due to the finite length of the cylinder section. Assuming small and smooth deformations allows to find shapes of the elastic support by relaxing the rigidity constraint: an inhomogeneous Lam\'e equation arises. Finally, this leads to a novel geometric effect: a global shrinking of the cylinder section with swellings.

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