Phys. Rev. Lett. 93, 097002 (2004) [4 pages]Vortex Nanoliquid in High-Temperature SuperconductorsReceived 4 April 2004; published 25 August 2004 Using a differential magneto-optical technique to visualize the flow of transport currents, we reveal a new delocalization line within the reversible vortex liquid region in the presence of a low density of columnar defects. This line separates a homogeneous vortex liquid, in which all the vortices are delocalized, from a heterogeneous “nanoliquid” phase, in which interconnected nanodroplets of vortex liquid are caged in the pores of a solid skeleton formed by vortices pinned on columnar defects. The nanoliquid phase displays high correlation along the columnar defects but no transverse critical current. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.097002
DOI:
10.1103/PhysRevLett.93.097002
PACS:
74.25.Qt, 74.25.Op, 74.25.Sv, 74.72.Hs
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