Low-coverage surface diffusion in complex periodic energy landscapes. II. Analytical solution for systems with asymmetric hops

We acknowledge support from the Ramon y Cajal Fellowship Program of the Spanish Ministry of Science and Innovation (M. A. Gosalvez), the JAE-Doc grant from the Junta para la Ampliacion de Estudios program cofunded by FSE (N. Ferrando), the University of the Basque Country (Grant No. GIC07IT36607), the Spanish Ministry of Science and Innovation (Grants No. FIS2013-48286-C02-02-P and No. FIS2013-48286-C02-01-P), the Basque Government through the Nanomaterials project under the nanoGUNE2014 program (Grant No. IE05-151), the Tomsk State University Academic D. I. Mendeleev Fund Program in 2015 (Research Grant No. 8.1.05.2015), and partial support from Saint Petersburg State University (Project No. 15.61.202.2015).