Quantum tunneling of vortices in high-Tc superconducting cuprates

A. García*, Xixiang Zhang, J. Tejada, D. Fiorani, A. M. Testa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Low-temperature magnetic relaxation experiments were performed in different T1- and Hg-based hightemperature superconducting cuprates (HTSCs). The temperature dependence of the time-logarithmic, normalized relaxation rate R ≡ {pipe}d(M/M0)/dln(t){pipe} gives evidence of a crossover from thermally activated to quantum vortex motion as temperature decreases. In addition, the field dependence of R reflects a crossover in the dimensionality of the tunneling object, from 3D flux lines to 2D vortices as field increases. Both results are consistent one with each other and with theories of quantum vortex motion in HTSCs.

Original languageEnglish (US)
Pages (from-to)1743-1744
Number of pages2
JournalCzechoslovak Journal of Physics
Issue numberSUPPL. 3
StatePublished - Dec 1 1996

ASJC Scopus subject areas

  • General Physics and Astronomy


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