The Role of Spin Anisotropy in the Unbinding of Interfaces

Details The Role of Spin Anisotropy in the Unbinding of Interfaces The Role of Spin Anisotropy in the Unbinding of Interfaces

1994-09-19

arxiv.org/abs/cond-mat/9409078v1

Physics

Condensed Matter

7 pages RevTeX, plus 1 postscript figure available from the authors OUTP-94-41S

Scientific paper

10.1209/0295-5075/28/7/002

We study the ground state of a classical X-Y model with $p \ge 3$-fold spin anisotropy $D$ in a uniform external field, $H$. An interface is introduced into the system by a suitable choice of boundary conditions. For large $D$, as $H \to 0$, we prove using an expansion in $D^{-1}$ that the interface unbinds from the surface through an infinite series of layering transitions. Numerical work shows that the transitions end in a sequence of critical end points.

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