Direct Probe of Superconductivity on the Atomic Scale

Direct detection of superconductivity has long been a key strength of point-contact Andreev reflection. However, its applicability to atomic-scale imaging is limited by the mechanical contact of the Andreev probe. To this end, researchers present a new method to probe Andreev reflection in a tunnel junction, leveraging tunneling spectroscopy and junction tunability to achieve quantitative …

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New Class of Superconductor

(Ba,K)BiO3 constitute an interesting class of superconductors, where the remarkably high superconducting transition temperature Tc of 30 K arises in proximity to charge density wave order. However, the precise mechanism behind these phases remains unclear. Here, enabled by high-pressure synthesis, we report superconductivity in (Ba,K)SbO3 with a positive oxygen–metal charge transfer energy in contrast to (Ba,K)BiO3. …

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Possible Room Temperature Superconductor Under Diamond Anvil Pressure

Superconductivity in a photochemically transformed carbonaceous sulfur hydride system, starting from elemental precursors, with a maximum superconducting transition temperature of 287.7 ± 1.2 kelvin (about 15 degrees Celsius) achieved at 267 ± 10 gigapascals. The superconducting state is observed over a broad pressure range in the diamond anvil cell, from 140 to 275 gigapascals, with …

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Foundational Stronger Magnet Made by Commonwealth Fusion Systems

Commonwealth Fusion Systems and MIT’s Plasma Science and Fusion Center (PSFC) have demonstrated a magnet with a record-breaking 20 Tesla magnetic field. This is the core technology that they planned to create. They now have to mass produce it at ten times lower cost and assemble it into a net energy gain system by 2025. …

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Progress to Practical Room Temperature Superconductors

Using extremely high pressures, experimentalists have created many superconducting hydride compounds including one—carbon sulfur hydride (CSH)—that appears to work at close to room temperature. Theorists have predicted other hydride compounds which could work at lower pressures. There is race to find versions stable at ambient pressure and room temperature. In 2004, Ashcroft suggested that adding …

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80 Times More Energy Prototype Superconducting Chips that Will Soon Reach 10 Ghz

Researchers from Yokohama National University in Japan have developed a prototype microprocessor using superconductor devices that are about 80 times more energy-efficient than CMOS semiconductor devices. Computers currently use 10% of global electricity. The adiabatic quantum-flux-parametron (AQFP) is a building block for ultra-low-power, high-performance microprocessors, and other computing hardware for the next generation of data …

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Room Temperature Superconductor Under Diamond Anvil Pressures

University of Rochester researchers squeezed carbonaceous sulfur hydride in a diamond anvil and it superconducted at 15 degrees Celsius under 270 gigapascals of pressure. This is about 2.5 million times regular atmospheric pressure. The bottom of the Mariana Trench has 1071 times the pressure of regular atmosphere. The sample were between 25 and 35 microns. …

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Superconductoring Alloys Found in Meteorites

Researchers used a highly sensitive technique to examine 16 samples from two different meteorites to find new superconducting alloys. One meteorite formed in the iron core of an asteroid and one flung off a planet’s surface by a collision. Above – Credit: Graeme Churchard/flickr. Samples from the Mundrabilla meteorite, which was found in Australia in …

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Uranium Ditelluride Could be Spin Triplet Superconductor and Is a New Wonder Material

Uranium di-telluride could be a wonder material for insanely powerful magnets and it could become the basis of next generation quantum computers. UTe2 might be the long-sought-after spin-triplet superconductor. The reason is very simple. If the spins of the electrons in the Cooper pair have opposite directions and we apply a magnetic field, it will …

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New Superconducting States Have Been Discovered

Superconductivity has been shown in monolayer crystals of, for example, molybdenum disulphide or tungsten disulfide that have a thickness of just three atoms. ‘In both monolayers, there is a special type of superconductivity in which an internal magnetic field protects the superconducting state from external magnetic fields,’ Ye explains. Normal superconductivity disappears when a large …

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New Superconducting Material Could Make Disruption Resistant Quantum Computers

In the new study, Yufan Li and colleagues found that a ring of β-Bi2Pd already naturally exists between two states in the absence of an external magnetic field. Current can inherently circulate both clockwise and counterclockwise, simultaneously, through a ring of β-Bi2Pd. Above – A visual representation of a qubit, which can exist simultaneously between …

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