Electronic component with Josephson junction, used detector/generator for terahertz radiation, comprises substrate and high-temperature superconductive material layer having grain boundary that forms weak bonds of Josephson junction

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This invention describes an electronic component using a Josephson junction, which is created by forming a grain boundary in a high-temperature superconducting (HTS) material layered on a specially textured substrate. The arrangement of the substrate and buffer layers ensures precise control over the crystal orientation and quality of the Josephson junction, which enables efficient generation or detection of terahertz (THz) radiation. This structure is also supported by a method for manufacturing such devices.

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• THz radiation detectors for scientific instrumentation and security scanning
• THz radiation generators for spectroscopy and material analysis
• Sensitive magnetic field sensors (SQUIDs) in medical and research applications
• High-speed, low-noise superconducting electronics for quantum computing
• Superconducting signal processing components in telecommunications

BenefitsContent extracted from patent full text and abstract with AI.

• Enables precise and reliable fabrication of high-quality Josephson junctions with controlled properties
• Improves performance in detecting and generating terahertz radiation, which is valuable for imaging and analysis
• Utilizes high-temperature superconductors, allowing for higher operational temperatures and easier cooling compared to conventional superconductors
• Potential for miniaturized, highly sensitive electronic components for quantum and advanced technological applications
• The method ensures reproducibility and scalability in production of superconducting electronic devices

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Patent Abstract

The electronic component with a Josephson junction comprises substrate (1.1) with a step edge in a textured substrate surface and a layer, which is arranged on the substrate and is made of a high-temperature superconductive material. The layer has a grain boundary (1.5) at the step edge. The grain boundary forms weak bonds of the Josephson junction of the electronic component, where a- and/or b-crystal axes on the plane of the high-temperature superconductive layer is disposed perpendicular to the grain boundary with a maximum tolerance of 10[deg] on both sides of the step edge. The electronic component with a Josephson junction comprises substrate (1.1) with a step edge in a textured substrate surface and a layer, which is arranged on the substrate and is made of a high-temperature superconductive material. The layer has a grain boundary (1.5) at the step edge. The grain boundary forms weak bonds of the Josephson junction of the electronic component, where a- and/or b-crystal axes on the plane of the high-temperature superconductive layer is disposed perpendicular to the grain boundary with a maximum tolerance of 10[deg] on both sides of the step edge by texturing the substrate and/or a textured, first buffer layer (1.2) arranged between the substrate and the high-temperature superconductive layer. The first buffer layer has a thickness of = 0.5 nm. Each lattice constant of the buffer layer is integral multiple or divider of the lattice constants C of the high temperature-superconductive material layer in a layer plane, and is close to the lattice constants A and B in the plane of the high temperature-superconductive material layer. A textured second buffer layer (1.3) is arranged between the substrate and the first buffer layer or between the first buffer layer and high temperature-superconductive material layer. The second buffer layer: is formed as a sole buffer layer; is thicker (100%) than the first buffer layer; and has, in its plane, a lattice constant, which is 90-100% of the lattice constant of high temperature superconducting functional layer along one of its axes a or b in the layer plane. Textured projections and/or recesses have an average height and/or depth of 1-5 nm. A radius of curvature of the substrate at the step edge is = 1 nm. The step edge separates a flat surface area from a curved surface area. A radius of curvature of the curved area is >= 1 mu m. The step edge separates two flat areas of the substrate with a first orientation. The flat area is inclined so that the high-temperature superconducting functional layer is disposed in a region of the step edge and in a crystal orientation of the substrate. The surface of the substrate at the step edge is inclined at an angle of 35-45[deg] . A nucleation layer made of material of the functional layer is arranged between the substrate and the high temperature superconducting functional layer. The nucleation layer has a thickness of 5-20 nm that 1/3 of a thickness of the functional layer. A barrier layer is provided with a thickness of 20-40 nm, and includes a perovskite structure. An independent claim is included for a method for manufacturing a Josephson junction electronic component.