Low-Temperature Expansion of the Free Energy in ASOS Model
Abstract
We calculate the low-temperature series of the free energy in absolute-value solid-on-solid (ASOS) model to order u23 using finite-lattice method. The property of the obtained series and the behavior of their Pad\'e approximants confirms us that the roughening transition in ASOS model is of Kosterlitz-Thouless type.
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