Otto, Florian and Bilusic, Ante and Babic, Dinko and Vodolazov, D. Yu and Sürgers, Christoph and Strunk, Christoph (2010) Reversal of Nonlocal Vortex Motion in the Regime of Strong Nonequilibrium. Physical Review Letters (PRL) 104, 027005.
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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 Vnl. At a high I of a given polarity, Vnl changes sign dramatically. This is followed by Vnl 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).
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||04 Mar 2010 15:49|
|Last Modified:||05 Mar 2010 10:15|
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