Observation of Kosterlitz-Thouless-type melting of the disordered vortex lattice in thin films of a-MoGe

Ali Yazdani, W. R. White, M. R. Hahn, M. Gabay, M. R. Beasley, A. Kapitulnik

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

Measurments of the ac penetration depth of a-MoGe films in the presence of a perpendicular magnetic field reveal an anomaly in the ac response of the vortex lattice at a characteristic temperature below the Hc2(T) line. The field and frequency dependence of this anomaly is found to be consistent with a Kosterlitz-Thouless-type melting of the two-dimensional vortex lattice. Moreover, we observe a crossover in the frequency dependence which suggests that the vortex lattice remains disordered on long length scales below the melting temperature.

Original languageEnglish (US)
Pages (from-to)505-508
Number of pages4
JournalPhysical review letters
Volume70
Issue number4
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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