Superconductors news and discussions

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weatheriscool
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Superconductors news and discussions

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Researchers develop new tool for analyzing large superconducting circuits
https://phys.org/news/2021-09-tool-larg ... cuits.html
by Northwestern University
The next generation of computing and information processing lies in the intriguing world of quantum mechanics. Quantum computers are expected to be capable of solving large, extremely complex problems that are beyond the capacity of today's most powerful supercomputers.

New research tools are needed to advance the field and fully develop quantum computers. Now Northwestern University researchers have developed and tested a theoretical tool for analyzing large superconducting circuits. These circuits use superconducting quantum bits, or qubits, the smallest units of a quantum computer, to store information.

Circuit size is important since protection from detrimental noise tends to come at the cost of increased circuit complexity. Currently there are few tools that tackle the modeling of large circuits, making the Northwestern method an important contribution to the research community.

"Our framework is inspired by methods originally developed for the study of electrons in crystals and allows us to obtain quantitative predictions for circuits that were previously hard or impossible to access," said Daniel Weiss, corresponding and first author of the paper. He is a fourth-year graduate student in the research group of Jens Koch, an expert in superconducting qubits.
weatheriscool
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Towards more energy-efficient 2D semiconductor devices
https://techxplore.com/news/2021-09-ene ... vices.html
by Singapore University of Technology and Design
According to researchers from the Singapore University of Technology and Design (SUTD), a recently discovered family of two-dimensional (2D) semiconductors could pave the way for high-performance and energy-efficient electronics. Their findings, published in npj 2D Materials and Applications, may lead to the fabrication of semiconductor devices applicable in mainstream electronics and optoelectronics—and even potentially replace silicon-based device technology altogether.

In the quest of miniaturizing electronic devices, one well-known trend is Moore's law, which describes how the number of components in the integrated circuits of computers doubles every two years. This trend is possible thanks to the ever-decreasing size of transistors, some of which are so small that millions of them can be crammed onto a chip the size of a fingernail. But as this trend continues, engineers are starting to grapple with the inherent material limitations of silicon-based device technology.

"Due to the quantum tunneling effect, shrinking a silicon-based transistor too small will lead to highly uncontrollable device behaviors," said SUTD Assistant Professor Ang Yee Sin, who led the study. "People are now looking for new materials beyond the 'silicon era', and 2D semiconductors are a promising candidate."
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Yuli Ban
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And remember my friend, future events such as these will affect you in the future
weatheriscool
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Researchers achieve charge-order-enhanced capacitance in semiconductor moiré superlattices
https://phys.org/news/2021-09-charge-or ... tices.html
by Ingrid Fadelli , Phys.org
In recent years, electronics engineers have been experimenting with new materials that could be used to study electronic correlation phenomena. Van der Waals (vdW) moiré materials are particularly promising for examining these phenomena. VdW materials are composed of strongly bonded two-dimensional (2D) layers that are bound in the third dimension through weaker dispersion forces.

The term moiré, on the other hand, refers to a specific pattern produced when an opaque ruled pattern with gaps is placed onto a similar pattern. Studies have recently unveiled robust and correlated insulating states at both integer and fractional filling factors of semiconducting materials with a moiré pattern.

Researchers at Cornell University and the National Institute for Materials Science in Japan have recently carried out a study exploring the thermodynamic properties of these robust correlated states. Their paper, published in Nature Nanotechnology, ultimately showed that capacitance (i.e., the ability of a system to store electric charge) can play a key role in probing correlated states of semiconductor moiré materials.
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