Researchers at the University of Warwick have found that phosphorus, an element commonly found in teeth, can act as a “superconductor” – but you would have to have the strength of Superman to clench your teeth hard enough for it to work - as it happens at a pressure of around 2.5 megabars – some 30,000 times harder than an ordinary human can clench their teeth.
Physicists were aware that lower pressures of around 0.1 megabars could convert the electrically insulating phosphorus to a form which can conduct and which allows limited superconductivity at 10 degrees Kelvin and under. Recently experimentalists have found that another form of phosphorus occurs when 2.5 megabars of pressure is applied which causes it to form a “body centred cubic” or bcc crystal structure, comprised of stacks of interpenetrating cubes of phosphorus atoms. Common metals such as iron and chromium have this structure at normal pressures. However it was not known until now if this form of phosphorus would superconduct.
Now University of Warwick physicists Sergey Ostanin and Julie Staunton have used a number of theoretical physics techniques to describe the movement of the electrons and ionic vibrations, which proves that this version of phosphorus is an even better superconductor than the phosphorus held under 0.1 megabars of pressure. The University of Warwick researchers predict that the bcc structure of phosphorus will in fact superconduct at temperatures of around 14-22 Kelvin.
Peter Dunn | University of Warwick
Computer model predicts how fracturing metallic glass releases energy at the atomic level
20.07.2018 | American Institute of Physics
What happens when we heat the atomic lattice of a magnet all of a sudden?
18.07.2018 | Forschungsverbund Berlin
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
20.07.2018 | Power and Electrical Engineering
20.07.2018 | Information Technology
20.07.2018 | Materials Sciences