Local studies of vortex instabilities and memory effects in NbSe2

Y. Paltiel*, E. Zeldov, Y. N. Myasoedov, S. Bhattacharya, M. J. Higgins, E. Y. Andrei, Z. L. Xiao, H. Shtrikman, P. L. Gammel, D. J. Bishop

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Recent studies have shown a number of surprising vortex dynamics phenomena which include: low frequency noise, slow voltage oscillations, history dependent dynamic response, memory of the direction, amplitude, and frequency of the previously applied current, suppression of the ac response by a small dc bias, and a strong frequency dependence. These phenomena are incompatible with the current understanding of bulk vortex dynamics. We propose a generic mechanism in terms of the competition between the injection of a disordered vortex phase through the surface barriers, and the annealing of this metastable disorder by the transport current. The model is confirmed by investigating the current distribution across 2H-NbSe2 crystals using arrays of Hall sensors.

Original languageAmerican English
Pages (from-to)1221-1222
Number of pages2
JournalPhysica C: Superconductivity and its Applications
StatePublished - 2000
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the Israel Science Foundation - Center of Excellence Program, by the German-Israeli Foundation GIF, and by NSF-DMR-9705389.


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