Josephson junction device for superconductive electronics with a magnesium diboride
AssigneeMassachusetts Institute of Technology
InventorsHeejae Shim, Jagadeesh S. Moodera
Life of this patent
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Abstract
A Josephson junction (JJ) device includes a buffered substrate comprising a first buffer layer formed on a substrate. A second buffer layer is formed on the first buffer layer. The second buffer layer includes a hexagonal compound structure. A trilayer structure is formed on the buffered substrate comprising at least two layers of a superconducting material. A thin tunnel barrier layer is positioned between the at least two layers. The buffered substrate is used to minimize lattice mismatch and interdiffusion in the trilayer structure so as to allow the JJ device to operate above 20 K.
Claims22
A Josephson junction (JJ) device comprising:
- a buffered substrate comprising a first buffer layer formed on a substrate, a second buffer layer being formed on said first buffer layer, said second buffer layer comprising a hexagonal compound structure;
- and
- a trilayer structure being formed on said buffered substrate comprising at least two layers of a superconducting material and a thin tunnel barrier layer positioned between said at least two layers;
- wherein
- said buffered substrate is used to minimize lattice mismatch and interdiffusion in said the trilayer structure so as to allow said JJ device to operate above 20 K.
A method of forming a Josephson junction (JJ) device comprising:
- forming a buffered substrate comprising a first buffer layer formed on a substrate, a second buffer layer being formed on said first buffer layer, said second buffer layer comprising a hexagonal compound structure;
- and
- forming a trilayer structure on said buffered substrate comprising at least two layers of a superconducting material and a thin tunnel barrier layer positioned between said at least two layers;
- wherein
- said buffered substrate is used to minimize lattice mismatch and interdiffusion in said the trilayer structure so as to allow said JJ device to operate above 20 K.
Dependencies are inferred from the claim text.