Latest Superconductivity Stories

2009-08-20 12:54:53

Canadian scientists are challenging physics' single-band Hubbard theory that's used to predict and calculate behavior of high-temperature superconductors. University of British Columbia researchers said their findings mark the first compelling evidence challenging the Hubbard model under certain conditions, and could necessitate entirely new theoretical approaches to explaining superconductivity in certain materials. Single-band Hubbard physics has been used for 20 years to predict how...

2009-08-19 16:04:12

New UBC research has literally and figuratively poked holes in single-band Hubbard physics--a model that has been used to predict and calculate the behavior of high-temperature superconductors for 20 years.The findings are the first compelling evidence challenging the model under certain conditions, and could necessitate entirely new theoretical approaches to explaining superconductivity in cuprate materials, one of the outstanding mysteries in condensed-matter physics."Single-band Hubbard...

2009-08-03 10:40:00

Hydrogen, the most common element in the universe, is normally an insulating gas, but at high pressures it may turn into a superconductor. Now, scientists at the Carnegie Institution in Washington D.C., US, have discovered a hydrogen-based compound that could be helpful in the search for metallic and superconducting forms of hydrogen. The results are reported in Physical Review Letters and highlighted in the August 3rd issue of APS's on-line journal Physics (physics.aps.org).Hydrogen is the...

2009-07-23 13:45:12

Reports about swimmers menaced by giant squids off San Diego raised the ire of marine biologist Brad Seibel who found the awesome monsters are really timid. And, afraid of the light. I want to spread the word that they aren't the aggressive man-eaters as they have been portrayed, said Seibel who has taken moonlight swims surrounded by a big gang of squids. For years Seibel, a biologist at the University of Rhode Island, had heard stories claiming that a Humboldt squid will devour a dog in...

2009-07-13 07:45:00

Superconductivity appears to rely on very different mechanisms in two varieties of iron-based superconductors. The insight comes from research groups that are making bold statements about the correct description of superconductivity in iron-based compounds in two papers about to be published in journals of the American Physical Society.The 2008 discovery of high-temperature superconductivity in iron-based compounds has led to a flood of research in the past year. As the literature mounts on...

2009-06-17 16:05:00

Superconductivity is a unique state in which electrons move freely inside a solid material. This complete lack of electrical resistance could translate to incredibly efficient electric power cables, as well as many other promising technologies.But there's a hitch. Most superconductors become that way only at very low temperatures, often near absolute zero (around -273 degrees Celsius or -460 degrees Fahrenheit). To chill a material enough so that its electrons become "unglued" from their...

2009-06-17 14:40:00

Researchers at the National Institute of Standards and Technology (NIST) have discovered that a reduction in mechanical strain at the boundaries of crystal grains can significantly improve the performance of high-temperature superconductors (HTS). Their results* could lead to lower cost and significantly improved performance of superconductors in a wide variety of applications, such as power transmission, power grid reliability and advanced physics research.One of the main challenges in...

2009-06-10 09:07:29

University of Texas at Austin physicists have created a superconducting lead sheet only two atoms thick, the thinnest such metal layer ever created. Professor Ken Shih and colleagues said the achievement lays the groundwork for future superconductor technologies. To be able to control this material -- to shape it into new geometries -- and explore what happens is very exciting, Shih said. My hope is that this superconductive surface will enable one to build devices and study new properties of...

2009-06-08 13:00:00

A superconducting sheet of lead only two atoms thick, the thinnest superconducting metal layer ever created, has been developed by physicists at The University of Texas at Austin.Dr. Ken Shih and colleagues report the properties of their superconducting film in the June 5 issue of Science.Superconductors are unique because they can maintain an electrical current indefinitely with no power source. They are used in MRI machines, particle accelerators, quantum interference devices and other...

2009-06-03 16:22:45

U.S. scientists have determined certain squids can detect light through a symbiotic organ, not just through their eyes. University of Wisconsin-Madison researchers said the light-emitting organ some squids use in camouflaging themselves to avoid being seen by predators also detects light. That, the scientists said, is a finding that might lead to insights into the mechanisms of controlling and perceiving light. Professor Margaret McFall-Ngai, who led the study, said the light organ, which...

Latest Superconductivity Reference Libraries

2010-09-23 20:39:09

An electromagnet, a magnet whose magnetic field is produced by the flow of electric current, works until the electric current ceases. The magnetic field in a simple electromagnet is created by a wire passing through it with an electric current. The strength of the magnet depends on the amount of current. By making the wire into a coil the magnetic field is concentrated. A straight tube coil is a solenoid. A stronger magnetic field can be produced by putting a ferromagnetic material, such as...

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Word of the Day
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.