1. Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
2. Centro de Enseñanza Técnica y Superior, Universidad Ensenada Camino a Microondas Trinidad, s/n Km. 1, Moderna Oeste, 22860 Ensenada, BC, México
3. Department of Theoretical Physics, Wroclaw University of Science and Technology, Wroclaw, Poland
4. Surface du Verre et Interfaces, UMR 125 CNRS/Saint-Gobain, F-93303 Aubervilliers, France and Department of Physics, NTNU—Norwegian University of Science and Technology, NO-7491 Trondheim, Norway and Department of Petroleum Engineering, University of Stavanger, NO-4036 Stavanger, Norway