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Reversal of Nonlocal Vortex Motion in the Regime of Strong Nonequilibrium

Otto, Florian; Bilušić, Ante; Babić, Dinko; Vodolazov, Denis Yu.; Sürgers, Christoph; Strunk, Christoph

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).

Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2010
Sprache Englisch
Identifikator DOI: 10.1103/PhysRevLett.104.027005
ISSN: 0031-9007
KITopen ID: 1000050505
Erschienen in Physical Review Letters
Band 104
Heft 2
Seiten 027005
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