Superconductivity in ultrathin artificial cuprate structures

Balestrino, G.; Lavanga, S.; Medaglia, P. G.; Orgiani, P.; Paoletti, A.; Pasquini, G.; Tebano, A.; Tucciarone, A.
July 2001
Applied Physics Letters;7/2/2001, Vol. 79 Issue 1, p99
Academic Journal
Layer-by-layer pulsed-laser deposition has been used to grow ultrathin superconducting (Ba[sub 0.9]Nd[sub 0.1])CuO[sub 2+x]/CaCuO[sub 2] artificial structures with various thicknesses of the two constituent layers. Superconductivity was observed in the ultrathin structure consisting of a single CaCuO[sub 2] superconducting block sandwiched between two (Ba[sub 0.9]Nd[sub 0.1])CuO[sub 2+x] blocks. The results obtained allowed an experimental demonstration of the currently accepted structural model for high T[sub C] superconductivity, which requires the presence in the same structure of two blocks with different functional properties: the superconducting infinite layer block and the nonsuperconducting charge reservoir block. © 2001 American Institute of Physics.


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