Cutoff parameter and vortex core size in d-wave superconductors P. Belova, I. Zakharchuk, A. Sharafeev, K. B. Traito and E. Lähderanta EPJ Web of Conferences, 75 (2014) 07002 Published online: 03 July 2014 DOI: 10.1051/epjconf/20147507002