Articoli in riviste
|Logarithmic corrections in the two-dimensional Ising model in a random surface field|
|Pleimling M., Bagamery F.A., Turban L., Iglói F.|
|Journal of Physics A: Mathematical and General 37 (2004) 8801|
|DOI : 10.1088/0305-4470/37/37/003|
|ArXiv : cond-mat/0402188 [PDF]|
|HAL : hal-00112745|
In the two-dimensional Ising model weak random surface field is predicted to be a marginally irrelevant perturbation at the critical point. We study this question by extensive Monte Carlo simulations for various strengths of disorder. The calculated effective (temperature or size-dependent) critical exponents fit with the field-theoretical results and can be interpreted in terms of the predicted logarithmic corrections to the pure system's critical behaviour.