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arXiv · 1010.0929

Damping of dHvA oscillations and vortex-lattice disorder in the peak-effect region of strong type-II superconductors

A. Maniv·T. Maniv·V. Zhuravlev·B. Bergk·J. Wosnitza·A. Kohler·G. Behr·P. C. Canfield·J. E. Sonier
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Abstract

The phenomenon of magnetic quantum oscillations in the superconducting state poses several questions that still defy satisfactory answers. A key controversial issue concerns the additional damping observed in the vortex state. Here, we show results of μSR, dHvA, and SQUID magnetization measurements on borocarbide superconductors, indicating that a sharp drop observed in the dHvA amplitude just below H_{c2} is correlated with enhanced disorder of the vortex lattice in the peak-effect region, which significantly enhances quasiparticle scattering by the pair potential.

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A. Maniv, T. Maniv, V. Zhuravlev, B. Bergk, J. Wosnitza, A. Kohler, G. Behr, P. C. Canfield, J. E. Sonier. 2010-10-05. Damping of dHvA oscillations and vortex-lattice disorder in the peak-effect region of strong type-II superconductors. https://doi.org/10.1103/physrevb.83.104505

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