December 10, 2016

Superconductivity- A New Theory

A high-temperature superconductor levitating above a magnet
An international team of scientists has announced the discovery of a new state of matter in a material that appears to be an insulator, superconductor, metal, and magnet combined together, that could lead to the development of more effective high-temperature superconductors. Why does this attract each of our attention? Practical energy production involves materials and resources that usually get worn out at higher temperatures, resulting in the retreat of all the steps taken ahead. Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic flux fields occurring in certain materials when cooled below a characteristic temperature. The electrical resistance of a metallic conductor decreases gradually as temperature is lowered. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source. This quantum mechanical phenomenon is characterized by the Meissner effect that states, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. A study was made on C60  molecules or “buckyballs” that resulted in a new type of metallic state of matter, after changing the distance between neighboring Buckyballs by doping the material with rubidium. While superconductivity has been observed in superconductors are due to the conduction of electrons forming pairs, The U.S. Department of Energy researchers believe a new theory, namely, that superconductivity is based on an undiscovered state of matter. This theory was approached as “The involvement of an additional phase, once fully understood, might open up new possibilities for achieving superconductivity at even higher temperatures in these materials.". High-temperature materials are often misleading when superconductivity has been given off as a phenomenon over a critical temperature thoroughly based on cooling. They have better perovskite and cubical structures and lattices that enhance our new technology. One-tenth of our population believes in its nature to contribute to the revolution in upcoming fields of technology such as nanotechnology, biotechnology, etc. The key is now in our hands, the lock-in our minds, procedure to let the lock in our minds freed is how we knock out this theory into our working world. Different labs coordinated separate experiments to zero in on whether superconductivity is based on a phase of matter other than the familiar solid, liquid, or gas.
The Stanford Synchrotron Radiation Lightsource used the magneto-optical Kerr effect, Berkeley Lab's Advanced Light Source team used angle-resolved photoemission spectroscopy, and a second group at Berkeley Lab used time-resolved reflectivity with a pump pulse from a laser. The resulting detailed characterization of the same high-temperature superconductor (bismuth strontium calcium copper oxide) led to the theory that a separate state of matter exists at temperatures just above the superconducting state. Next, the researchers plan to explore the electronic properties of this new state of matter in a bid to discover how to extend superconductivity to room temperature. Credits to “Jahn-Teller metal” (“Jahn-Teller effect,” used in chemistry to describe how at low pressures, the geometric arrangement of molecules and ions in an electronic state can become distorted, this new state of matter allows scientists to transform an insulator, which can’t conduct electricity, into a conductor by merely applying pressure) that gave rise to questioning over this theory as it served as an unconventional metal that gave rise to new state of matter. This new state of matter will allow scientists to better understand why some materials have the potential to achieve superconductivity at a relativity high critical temperature(Tc), "high" as in -135 °C as opposed to −243.2 °C. Because superconductivity allows material to conduct electricity without resistance, which means no heat, sound, or any other form of energy release, achieving this would revolutionize how we use and produce energy. Still, it’s only feasible if we can make it at so-called high temperatures. The new theory comes from the U.S. Department of Energy researchers at Berkeley Lab, the University of California at Berkeley, and the SLAC National Accelerator Laboratory at Stanford University (Palo Alto, Calif.; SLAC's original name was the Stanford Linear Accelerator Centre).



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