Josephson junction device of oxide superconductor having low noise level at liquid nitrogen temperature
AssigneeSumitomo Electric Industries, Ltd.
InventorHirokazu Kugai
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Abstract
In a Josephson junction device comprises two superconducting electrodes formed of an oxide superconductor and connected through a Josephson junction, a temperature dependent noise of the Josephson junction becomes the minimum at a liquid nitrogen temperature.
Claims12
A method of reducing the noise level at the temperature of liquid nitrogen of a Josephson junction device such that the temperature dependent noise of the Josephson junction is at a minimum at the temperature of liquid nitrogen, comprising the step of forming two superconducting electrodes of an oxide superconductor, wherein the electrodes are connected through a Josephson junction, wherein the oxide superconductor is characterized by an impurity which lowers the critical temperature as compared to a conventional oxide superconductor so that the temperature dependent noise of the Josephson junction is at a minimum at the temperature of liquid nitrogen.
Dependencies are inferred from the claim text.