Preparation of Refractory Tunnel Barriers of Sputtered Boron Nitride.
Abstract
The present invention relates to Josephson Junctions. More specifically the present invention relates to high quality artificial tunnel barriers found in a Josephson junction. A Josephson Junction is a weak connection between two superconducting layers through which the Josephson effect is realized. The Josephson effect Is where the passage of paired electrons (Cooper pairs) through a weak connection forms a current (supercurrent) in addition to the usual current that results from the passage or tunneling of single electrons. Objects of the present invention are to provide a tunnel barrier that has a sharp even interface with the superconducting metal; to provide a tunnel barrier that is amorphous; and to provide a tunnel barrier that does not breakdown under high temperature conditions. These, and other objects of the present invention ar achieved with a Josephson junction comprising: a first superconducting layer; a second superconducting layer; and a tunnel barrier of boron nitride located between the first and second superconducting layers and in contact therewith.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 23, 1985
- Accession Number
- ADD012184
Entities
People
- John H. Claassen
- Kenneth E. Kihlstrom
- Randy W. Simon
Organizations
- United States Department of the Navy