ROUGHENING at the TECHNION
After the initial observation of the roughening transition interest turned to the order of roughening temperatures of the different facets.
A large NNN term was needed in order to achieve experimental/simulation agreement between the ratios of the roughening transition temperatures of the different facets. This could be realistic, or the experimental measurements could not have been in true equilibrium. To the best of my knowledge this was not confirmed, because experimental focused turned to different directions.