Deciphering the origin of nonlocal resistance in multiterminal graphene on hexagonal-boron-nitride with ab initio quantum transport : fermi surface edge currents rather than Fermi sea topological valley currents - Marmolejo Tejada, J. M. (University of Delaware. Department of Physics and Astronomy) ; Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ; Petrović, M. D. (University of Delaware. Department of Mathematical Sciences) ; Chang, P-H (University of Nebraska Lincoln. Department of Physics and Astronomy) ; Sheng, X-L (University of Delaware. Department of Mathematical Sciences) ; Cresti, Alessandro (Université Grenoble Alpes) ; Plecháč, P. (University of Delaware. Department of Mathematical Sciences) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Nikolić, B. K. (University of Delaware. Department of Physics and Astronomy)