تقرير
Apparent first-order wetting and anomalous scaling in the two-dimensional Ising model
| العنوان: | Apparent first-order wetting and anomalous scaling in the two-dimensional Ising model |
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| المؤلفون: | Wu, X. T., Abraham, D. B., Indekeu, J. O. |
| المصدر: | Phys. Rev. Lett. 116, 046101 (2016) |
| سنة النشر: | 2014 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Statistical Mechanics |
| الوصف: | The global phase diagram of wetting in the two-dimensional (2d) Ising model is obtained through exact calculation of the surface excess free energy. Besides a surface field for inducing wetting, a surface-coupling enhancement is included. The wetting transition is critical (second order) for any finite ratio of surface coupling J_s to bulk coupling J, and turns first order in the limit J_s/J to infinity. However, for J_s/J much larger than 1 the critical region is exponentially small and practically invisible to numerical studies. A distinct pre-asymptotic regime exists in which the transition displays first-order character. Surprisingly, in this regime the surface susceptibility and surface specific heat develop a divergence and show anomalous scaling with an exponent equal to 3/2. Comment: This new version presents the exact solution and its properties whereas the older version was based on an approximate numerical study of the model |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.116.046101 |
| URL الوصول: | http://arxiv.org/abs/1410.8574 |
| رقم الأكسشن: | edsarx.1410.8574 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.116.046101 |
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