Trapping solids at the inner edge of the dead zone: 3-D global MHD simulations N. Dzyurkevich, M. Flock, N. J. Turner, H. Klahr and Th. Henning A&A, 515 (2010) A70 Published online: 10 June 2010 DOI: 10.1051/0004-6361/200912834