A5100657121- Physics of Superconductivity and Magnetism
- Advanced Electrical Measurement Techniques
- Quantum and electron transport phenomena
- Superconducting and THz Device Technology
- Magnetic Field Sensors Techniques
- Quantum optics and atomic interactions
- Semiconductor Quantum Structures and Devices
- Magneto-Optical Properties and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Cold Atom Physics and Bose-Einstein Condensates
- Mechanical and Optical Resonators
- Magnetic Properties and Applications
- Graphene research and applications
- Semiconductor materials and devices
- Surface and Thin Film Phenomena
- Magnetic properties of thin films
- Galaxies: Formation, Evolution, Phenomena
- Sensor Technology and Measurement Systems
- Metal and Thin Film Mechanics
- Climate variability and models
- Copper Interconnects and Reliability
- Advanced Optical Sensing Technologies
- Quantum Information and Cryptography
- Power Quality and Harmonics
- Photonic and Optical Devices
National Institute of Metrology
2016-2025
First Affiliated Hospital of GuangXi Medical University
2024
Guangxi Medical University
2024
Tsinghua University
2020
General Administration of Quality Supervision, Inspection and Quarantine
2017
Tangshan College
2011
Huazhong University of Science and Technology
2008-2010
Wuhan National Laboratory for Optoelectronics
2010
Purpose As the complexity and uncertainty of infrastructural megaprojects challenge traditional management models, there is an increasing focus on value co-creation as organizational strategy to streamline management. However, role behavior in facilitating realization process remains underexplored. This study examines how justice perception (distributive, procedural interactional justice) improves contractor behavior, focusing mediating psychological ownership. Design/methodology/approach...
The Hot Universe Baryon Surveyor (HUBS) mission is proposed to study "missing" baryons in the universe. Unlike dark matter, baryonic matter made of elements periodic table, and can be directly observed through electromagnetic signals that it produces. Stars contain only a tiny fraction known present Additional are found diffuse (gaseous) form, or between galaxies, but significant has not yet been seen. latter (missing baryons) thought hiding low-density warm-hot ionized medium (WHIM), based...
Magnetron sputtering is an important method in the superconducting thin films deposition. The residual gas inside vacuum chamber will directly affect quality of films. In this paper, niobium are deposited by magnetron under different conditions. influence baking and process on studied as well. Surface morphology, electrical mechanical properties analysed. analysis result before could be regarded a reference condition to achieve high
Abstract In this study, we developed a series of second-order gradient overlap-coupling octagonal superconducting quantum interference device (SQUID) current sensors for transition edge sensor (TES) applications. According to the requirements TESs, designed various parameters SQUID sensors, including different Josephson junction (JJ) sizes, hysteresis and screening parameters, input coils with inductances. The loop, coil, feedback coil adopt structure, which can effectively enhance their...
As Nb films are widely used as superconducting electrodes of Josephson junctions, it is important to investigate the properties in order fabricate high-quality junctions. In this work, we conducted a comprehensive analysis relationships among DC magnetron sputtered with constant power fabricated at National Institute Metrology (China). The film properties, including superconductivity, stress, lattice constant, and surface roughness, were investigated. It was found that case Ar pressure,...
Abstract The Nb/Al-AlO x /Nb (SIS) Josephson junction is a crucial component in many types of superconducting devices. However, it can be easily damaged during the plasma fabrication processes. Anodic oxidation an effective method for protecting SIS junctions by oxidizing Nb and Al from profile. We used custom wafer-scale anodic system neutral electrolyte to study process films Nb-Al(-AlO )-Nb junctions. was thoroughly characterized considering factors such as morphology electrical...
Josephson junction array chips for microvolt applications have been designed and fabricated. A voltage step as small 1 μV has observed a single in the when it is driven by 483.59 MHz microwave. By selecting different parts of array, can output from to 256 μV. The flat region steps over 200 μA. This kind useful potential applications.
We reported the new design of quantum Hall array resistances. Two resistances, 100Ω and 1kΩ, were achieved by series parallel connections single device based on AlGaAs/GaAs heterostructure. The relative deviations from nominal value -3.42 parts 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">8</sup> for both design.
Owing to the adjustable characteristics and superior etching properties of co-sputtered NbxSi1 − x film, we are trying fabricate Nb/NbxSi1 x/Nb Josephson junction arrays for voltage standard. It is important find suitable barrier junctions. junctions with different content fabricated. Current–voltage measured analyzed. demonstrated in this paper that critical current can be adjusted by using thickness. Shapiro steps five hundred series observed.
SiO2 is one of the most widely used dielectric materials in optical and electronic devices. The Josephson voltage standard (JVS) chip fabrication process has rigorous requirements for deposition temperature step-coverage profiles insulation layer. In this study, we deposited high-quality films at 60 °C using inductively coupled plasma-chemical vapor (ICP-CVD) to fulfill these fabricate JVS chips simultaneously. have a high density, low compressive stress, sloped sidewall profile over...
The critical temperature ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T</i> <sub xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> ) of superconducting Ti/Au bilayer films is crucial for the performance transition-edge sensors. We use a co-sputtering technique to insert Ti-Au mixture layer as an artificial diffusion between Ti film and normal Au bilayer. layers have different thicknesses component ratios. cross-section element...
Wafer-scale monolayer graphene film was synthesized on Cu foils by chemical vapor deposition in a 3-in thermal furnace. Graphene transferred to the surface of SiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> (300 nm)/Si substrates using polymer-assisted method. Hall bar structures were fabricated lithography and E-beam for electrical property measurement. Perfect symmetrical ohmic resistance distribution achieved. The longitudinal...
Superconducting quantum interference devices (SQUIDs) with 3 μm × or 4 self-shunted Nb/Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> Si xmlns:xlink="http://www.w3.org/1999/xlink">1-x</sub> /Nb Josephson junctions are designed and fabricated. By adjusting the Nb content thickness of barrier, parameters SQUIDs can be easily tuned. The optimal for barrier found to a around 15 nm 7% content. I-V curve, V-Φ noise spectrum measured SQUID....
The design, fabrication, and the characterization of a 0.5-V Josephson junction array device are presented for quantum voltage standards in National Institute Metrology (NIM) China. consists four arrays, each which has 1200 3-stacked Nb/Nb x Si 1− /Nb junctions an on-chip superconducting microwave circuit is mainly power divider enabling being loaded with equal amount power. A direct current (dc) about 0.5 V ∼1-mA margin 1st step obtained. To further prove quality NIM device, comparison...
We report in CPEM 2014 our latest results of the study single quantum Hall device for resistance standard National Institute Metrology, China (NIM). Experimental indicate quantized devices with satisfied longitudinal resistance, low contact and good breakdown current are obtained. Comparison to a precise transfer is made using direct comparator (DCC). A measurement resolution on level 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-7</sup>...