Superconducting Josephson junctions.

摘要

Superconducting Josephson junctions having a layer of niobium nitride on a substrate, an epitaxial layer of a pseudo-binary compound on the layer of niobium nitride, where the pseudo-binary compound has the composition 3 atomic per cent MgO - 97 atomic per cent CaO, to 97 atomic per cent MgO % 3 atomic per cent CaO, and an epitaxial layer of niobium nitride on the layer of pseudo-binary compound. Also a method of making a Josephson junction by depositing a layer of niobium nitride onto a suitable substrate, depositing an epitaxial layer of a pseudo-binary compound onto the layer of niobium nitride, where the pseudo-binary compound has a composition of 3 atomic per cent MgO - 97 atomic per cent CaO, to 97 atomic per cent MgO - 3 atomic per cent CaO, and depositing an epitaxial layer of niobium nitride onto the layer said pseudo-binary compound.