-
-
News
News Highlights
- Books
Featured Books
- design007 Magazine
Latest Issues
Current IssueSilicon to Systems: From Soup to Nuts
This month, we asked our expert contributors to weigh in on silicon to systems—what it means to PCB designers and design engineers, EDA companies, and the rest of the PCB supply chain... from soup to nuts.
Cost Drivers
In this month’s issue of Design007 Magazine, our expert contributors explain the impact of cost drivers on PCB designs and the need to consider a design budget. They discuss the myriad design cycle cost adders—hidden and not so hidden—and ways to add value.
Mechatronics
Our expert contributors discuss the advent of mechatronics in PCB design, the challenges and opportunities this creates for circuit board designers, and the benefits—to the employee and the company—of becoming a mechatronics engineer.
- Articles
- Columns
Search Console
- Links
- Events
||| MENU - design007 Magazine
Seeking out New Functions for Superconducting Nanoelectronics
June 16, 2017 | University of TokyoEstimated reading time: 2 minutes
A team of researchers at the University of Tokyo and their collaborators discovered that a two-dimensional semiconductor with a broken inversion symmetry demonstrates rectification, or the property of a diode, under a magnetic field applied in a certain direction. This finding provides important insights essential for developing the next generation of superconducting nanoelectronic materials.
In general, a magnetic field applied in a specific direction in a system in which the spatial inversion symmetry is broken generates rectifying characteristics, but the rectification property is larger in the superconducting state, compared to the normal conducting state. 2017 Ryohei Wakatsuki, Yu Saito.
Superconductivity is a property in which electrical resistance disappears; it has been the focus of much basic and applied research around the world as a next-generation technology that could enhance energy conservation. The integration of superconductors is expected to play an important role in next-generation computing systems, such as in the area of superconducting quantum bits; thus, there is much demand for the development of new functions of superconducting nanoelectronics for these purposes—especially superconductors with a rectifying property, i.e., superconducting diodes. Although recent research has revealed rectification in a normal conductor crystal with a broken inversion symmetry, not much research has been conducted on the rectification property of a superconductor lacking inversion symmetry.
The research group led by graduate students Ryohei Wakatsuki and Yu Saito, Professor Yoshihiro Iwasa, and Professor Naoto Nagaosa at the Graduate School of Engineering, the University of Tokyo, and their collaborators fabricated an electric double-layer transistor (EDLT) structure, a kind of field effect transistor, using a high-quality single crystal of molybdenum disulfide (MoS2), a layered material that is a type of atomic film material. The capacity of electrons induced by the strong electric field to accumulate on the surface of a single crystal of MoS2 in this structure makes it possible to realize synthetically the extremely thin, one-atomic-layer-thick ultimate two-dimensional superconductivity. In the current study, the researchers measured the electric conduction characteristics of a MoS2-EDLT device with a magnetic field applied perpendicular to the surface. They observed extremely large rectifying characteristics in the superconducting state by measuring the second harmonic component of electric resistance to examine rectification.
Moreover, the scientists applied theoretical calculations for superconducting fluctuation currents to explain the mechanism of the enhanced rectification property, and showed that the phenomenon could occur in any superconductor with a broken inversion symmetry.
"The nonlinear response of rectifying characteristics and electric current discovered in this research is considered to be a universal phenomenon in superconductors in which the spatial inversion symmetry has been broken," says Professor Nagaosa. He continues, "The present result will pave the way for the development of functions of superconducting nanoelectronics, as well as become the cornerstone of a new academic field created to study two-dimensional superconductivity with broken spatial inversion symmetry."
Suggested Items
RTX's Raytheon Selected to Streamline Production of SPY-6 Transmit/Receive Modules
09/18/2024 | PRNewswireRaytheon, an RTX business, has been awarded an Office of Naval Research (ONR) Navy ManTech project from Penn State University Applied Research Laboratory's Electronics Manufacturing Center of Excellence to streamline the production of SPY-6 Transmit/Receive (TR) modules.
Greg LaRocca Joins SIA as Director of Industry Research and Economic Policy
09/06/2024 | SIAThe Semiconductor Industry Association (SIA) announced Greg LaRocca has joined the SIA team as director of industry research and economic policy. LaRocca will lead SIA’s industry statistics, data analytics, and market research work.
Dr. Jennie Hwang to Deliver Course on AI Opportunities, Challenges, Possibilities at SMTAI
08/28/2024 | Dr. Jennie HwangDr. Jennie Hwang, Chair of AI Committee of National Academies/DoD AI study, Chair of Review Panel of National AI Institute of NSF, and Committee of Strategic Thinking for Engineering Research in the Era of Artificial Intelligence of NSF, brings broad-based information and insights through an integrated perspective to the AI course.
C3 AI Recognized by Constellation Research for Cross-Category Leadership in Artificial Intelligence and Machine Learning Platforms
08/23/2024 | BUSINESS WIREC3 AI, the Enterprise AI application software company, announced it was named to both the Constellation ShortList™ for Artificial Intelligence and Machine Learning Best-of-Breed Platforms and the Constellation ShortList™ for Artificial Intelligence and Machine Learning Cloud Platforms in Q3 2024.
New Center to Improve Robot Dexterity Selected to Receive Up to $52M
08/21/2024 | Northwestern UniversityA large multi-institutional collaboration, led by Northwestern University, has received $26 million from the National Science Foundation (NSF) to launch a new Engineering Research Center (ERC) dedicated to revolutionizing the ability of robots to amplify human labor.