Authors: George Rajna
In strongly correlated materials such as cuprate high-temperature superconductors, superconductivity can be controlled either by changing the number of electrons or by changing the kinetic energy, or transfer energy, of electrons in the system.  Researchers have seen intrinsic superconductivity up to a temperature of 0.72 K in the transition metal dichalcogenide niobium telluride (NbTe2).  Researchers in France and Japan have demonstrated a theoretical type of unconventional superconductivity in a uranium-based material, according to a study published in the journal Physical Review Letters.  Researchers from Tokyo Metropolitan University have found that crystals of a recently discovered superconducting material, a layered bismuth chalcogenide with a four-fold symmetric structure, shows only twofold symmetry in its superconductivity.  Russian physicist Viktor Lakhno from Keldysh Institute of Applied Mathematics, RAS considers symmetrical bipolarons as a basis of high-temperature superconductivity.  Scientists at the Department of Energy's SLAC National Accelerator Laboratory and Stanford University have shown that copper-based superconductors, or cuprates-the first class of materials found to carry electricity with no loss at relatively high temperatures-contain fluctuating stripes of electron charge and spin that meander like rivulets over rough ground.  Researchers from Google and the University of California Santa Barbara have taken an important step towards the goal of building a large-scale quantum computer.  Physicists have shown that superconducting circuits-circuits that have zero electrical resistance-can function as piston-like mechanical quantum engines. The new perspective may help researchers design quantum computers and other devices with improved efficiencies. 
Comments: 25 Pages.
[v1] 2019-05-11 07:20:36
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