High temperature superconducting materials
AssigneeCalifornia Institute of Technology
InventorJamil Tahir-Kheli
Life of this patent
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Abstract
A superconducting composition of matter including overlapping first and second regions. The regions comprise unit cells of a solid, the first region comprises an electrical insulator or semiconductor, and the second region comprises a metallic electrical conductor. The second region extends through the solid and a subset of said second region comprise surface metal unit cells that are adjacent to at least one unit cell from the first region. The ratio of the number of said surface metal unit cells to the total number of unit cells in the second region being at least 20 percent.
Claims20
A cuprate superconductor, comprising:
- a wire comprising:
- grain boundaries;
- an aperiodic lattice of CuO2 planes;
- and
- first atoms occupying sites between said CuO2 planes, dopant atoms comprising second atoms and third atoms occupying first atom sites, where the second atoms are p-type dopants relative to the first atoms, and the third atoms are n-type dopants relative to the first atoms;
- wherein:
- the total concentration of said dopant atoms is greater than 20% of the concentration of said first atoms,
- the concentration of said second atoms is greater than 5% of the concentration of said first atoms, and
- the concentration of said third atoms is greater than 5% of the concentration of said first atoms.
A method of making a cuprate superconductor, comprising:
- fabricating a wire comprising:
- grain boundaries;
- an aperiodic lattice of CuO2 planes;
- and
- first atoms occupying sites between said CuO2 planes, dopant atoms comprising second atoms and third atoms occupying first atom sites, where the second atoms are p-type dopants relative to the first atoms, and the third atoms are n-type dopants relative to the first atoms;
- wherein:
- the total concentration of said dopant atoms is greater than 20% of the concentration of said first atoms,
- the concentration of said second atoms is greater than 5% of the concentration of said first atoms, and
- the concentration of said third atoms is greater than 5% of the concentration of said first atoms;
- and
- measuring an S-wave property of the cuprate superconductor.
A method of using a cuprate superconductor, comprising:
- obtaining a wire comprising:
- grain boundaries;
- an aperiodic lattice of CuO2 planes;
- and
- first atoms occupying sites between said CuO2 planes, dopant atoms comprising second atoms and third atoms occupying first atom sites, where the second atoms are p-type dopants relative to the first atoms, and the third atoms are n-type dopants relative to the first atoms;
- wherein:
- the total concentration of said dopant atoms is greater than 20% of the concentration of said first atoms,
- the concentration of said second atoms is greater than 5% of the concentration of said first atoms, and
- the concentration of said third atoms is greater than 5% of the concentration of said first atoms;
- and
- using an S-wave property of the cuprate superconductor.
Dependencies are inferred from the claim text.