Physics – Condensed Matter – Superconductivity
Scientific paper
2003-01-14
Phys. Rev. Lett. 90, 087004 (2003)
Physics
Condensed Matter
Superconductivity
(1) Paper to appear in Physical Review Letters. (2) 4 pages of text and 5 figures (3 figures in jpg and 2 figures in ps format
Scientific paper
10.1103/PhysRevLett.90.087004
Bitter decoration and magneto-optical studies reveal that in heavy-ion irradiated superconductors, a 'porous' vortex matter is formed when vortices outnumber columnar defects (CDs). In this state ordered vortex crystallites are embedded in the 'pores' of a rigid matrix of vortices pinned on CDs. The crystallites melt through a first-order transition while the matrix remains solid. The melting temperature increases with density of CDs and eventually turns into a continuous transition. At high temperatures a sharp kink in the melting line is found, signaling an abrupt change from crystallite melting to melting of the rigid matrix.
Banerjee Sambaran
der Beek Cornelis J. van
Fasano Yanina
Konczykowski Marcin
la Cruz F. de
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