Naslov
Nonlocal versus local vortex dynamics in the transversal flux transformer effect

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

Izvornik
Physical Review B - Condensed Matter and Materials Physics (1098-0121) 81 (2010), 17; 174521-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Vortex; nonlocality; nonequilibrium; dissipation

Sažetak
In this follow-up to our recent Letter [F. Otto et al., Phys. Rev. Lett. 104, 027005 (2010)], we present a more detailed account of the superconducting transversal flux transformer effect (TFTE) in amorphous (a-)NbGe nanostructures in the regime of strong nonequilibrium in local vortex motion. Emphasis is put on the relation between the TFTE and local vortex dynamics, as the former turns out to be a reliable tool for determining the microscopic mechanisms behind the latter. By this method, a progression from electron heating at low temperatures T to the Larkin-Ovchinnikov effect close to the transition temperature Tc is traced over a range 0.26 < T/T_c < 0.95. This is represented by a number of relevant parameters such as the vortex transport entropy related to the Nernst-like effect at low T, and a nonequilibrium magnetization enhancement close to Tc. At intermediate T, the Larkin-Ovchinnikov effect is at high currents modified by electron heating, which is clearly observed only in the TFTE.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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