The excitement centers around a new class of high-temperature superconductors -- initially discovered in February and March by Japanese and Chinese researchers -- and the effort to learn more about them. Dai and his team published major new findings about the materials in this week's online edition of the leading scientific journal Nature.
For more than 20 years, scientists have struggled to understand the phenomenon of high-temperature superconductors. The materials move electricity with incredible efficiency -- something that, if fully understood and controlled, could have a major impact on energy use around the world. Their impact could be felt in a variety of ways, from how we transmit electricity into homes to how we power the massive machines used in industry.
Conventional superconductors only possess the property at incredibly cold temperatures -- far too cold for widespread practical use, which is what drives the search for materials that are superconductors at higher temperatures.
When research showed that the new materials could be superconductors at higher temperatures than any conventional superconductors recorded -- 43 Kelvin -- Dai shifted his research group into high gear, contacting colleagues in China to send samples to him.
"When I saw [the superconducting temperature] hit 43K," said Dai, a UT Knoxville-ORNL joint faculty member, "I called and said, 'Send them over.' The sample arrived at UT that Friday. Clarina [de la Cruz, the study's lead author] went to Maryland that night, and ORNL the next week."
De la Cruz, the study's lead author and a postdoctoral researcher in Dai's lab and ORNL, was at the campus of the National Institute of Standards and Technology (NIST) in less than 12 hours, using an instrument that bombards the material with neutrons to learn more about its characteristics. Part of the research also was conducted at ORNL's High Flux Isotope Reactor a few days later.
What de la Cruz and Dai found was that the new materials share a common trait with another class of high-temperature superconductors -- when the materials are doped to become superconducting, they lose their static magnetism.
It's a trait that that Dai and his team have studied extensively in superconductors known as cuprates, and this finding is a step toward showing that there may be a broader significance to the tie between magnetism and superconductivity.
"In our view, it is extremely important to find another example," Dai said. "It is not exactly the same as the cuprates, but it is similar."
The speed with which their research was conducted reflects the competitive nature of superconductivity research, a field which already has led to two Nobel Prizes.
Dai and his research team will continue to analyze the new material, in hopes of finding the common threads that make materials superconductive.
"The hope, the dream of the research is to engineer the process to happen at higher and higher temperatures," he said. The end goal is to be able to harness the unique property at temperatures that do not require incredibly cold and incredibly controlled situations.
Jay Mayfield | EurekAlert!
Immortal quantum particles: the cycle of decay and rebirth
14.06.2019 | Technische Universität München
Small currents for big gains in spintronics
13.06.2019 | University of Tokyo
The well-known representation of chemical elements is just one example of how objects can be arranged and classified
The periodic table of elements that most chemistry books depict is only one special case. This tabular overview of the chemical elements, which goes back to...
Light can be used not only to measure materials’ properties, but also to change them. Especially interesting are those cases in which the function of a material can be modified, such as its ability to conduct electricity or to store information in its magnetic state. A team led by Andrea Cavalleri from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg used terahertz frequency light pulses to transform a non-ferroelectric material into a ferroelectric one.
Ferroelectricity is a state in which the constituent lattice “looks” in one specific direction, forming a macroscopic electrical polarisation. The ability to...
Researchers at TU Graz calculate the most accurate gravity field determination of the Earth using 1.16 billion satellite measurements. This yields valuable knowledge for climate research.
The Earth’s gravity fluctuates from place to place. Geodesists use this phenomenon to observe geodynamic and climatological processes. Using...
Discovery by Brazilian and US researchers could change the classification of two species, which appear more akin to jellyfish than was thought.
The tube anemone Isarachnanthus nocturnus is only 15 cm long but has the largest mitochondrial genome of any animal sequenced to date, with 80,923 base pairs....
Researchers at Chalmers University of Technology, Sweden, have discovered a completely new way of capturing, amplifying and linking light to matter at the nanolevel. Using a tiny box, built from stacked atomically thin material, they have succeeded in creating a type of feedback loop in which light and matter become one. The discovery, which was recently published in Nature Nanotechnology, opens up new possibilities in the world of nanophotonics.
Photonics is concerned with various means of using light. Fibre-optic communication is an example of photonics, as is the technology behind photodetectors and...
29.04.2019 | Event News
17.04.2019 | Event News
15.04.2019 | Event News
17.06.2019 | Information Technology
17.06.2019 | Earth Sciences
17.06.2019 | Ecology, The Environment and Conservation