title: Reversal of nonlocal vortex motion in the regime of strong nonequilibrium.
abstract: We investigate nonlocal vortex motion in weakly pinning a-NbGe nanostructures, which is driven by a transport current I and remotely detected as a nonlocal voltage V{nl}. At a high I of a given polarity, V{nl} changes sign dramatically. This is followed by V{nl} becoming even in I, with the opposite sign at low and high temperatures T. These findings can be explained by a Nernst-like effect resulting from local electron overheating (low T), and a magnetization enhancement due to a nonequilibrium quasiparticle distribution that leads to a gap enhancement near the vortex core (high T).
authors.affiliation: Institute for Experimental and Applied Physics, University of Regensburg, D-93025 Regensburg, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Otto
authors.forename: Ante
authors.initials: A
authors.lastname: Bilusić
authors.forename: Dinko
authors.initials: D
authors.lastname: Babić
authors.forename: Denis Yu
authors.initials: DY
authors.lastname: Vodolazov
authors.forename: Christoph
authors.initials: C
authors.lastname: Sürgers
authors.forename: Christoph
authors.initials: C
authors.lastname: Strunk