High critical temperature in a superlattice of quantum wires
- A. Bianconi
- M. Missori
- N. L. Saini
- H. Oyanagi
- H. Yamaguchi
- D. H. Ha
- Y. Nishihara
DOIAbstract
Here we report experimental evidence that the high T-C superconductivity in a cuprate perovskite occurs in a superlattice of Josephson coupled quantum wires. We show that this particular heterostructure provides the physical mechanism raising Te from the low temperature range TC<23K to the high temperature range 30K<T-C<150K by amplification of the critical temperature of the homogeneous CuO2 plane by a factor similar to 10. The structure of the high T-C superconducting CuO2 plane in Bi2Sr2CaCu2O8+y (Bi2212) at the mesoscopic level (10-100 Angstrom) has been determined. The superconducting plane is decorated by a plurality of parallel superconducting stripes of width L defined by the domain walls formed by stripes of width W characterized b...
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