Phys.org December 17, 2021 The technique of ion irradiation to enhance the dissipation-free supercurrent in the presence of a magnetic field for type II superconductors is complicated and expensive. An international team of researchers (Japan, USA – Florida State University) has developed an inexpensive, scalable way to produce high-temperature superconductors using grain boundary engineering techniques. They grew iron-based superconductors (FBS) called “potassium-doped BaFe2As2 (Ba122) using molecular beam epitaxy, in which the superconductor is grown on a substrate. It had high pinning efficiency without artificial pinning centers (APCs). Measurements of the thin film’s electrical resistivity and magnetic properties showed that the […]
Tag Archives: high-temperature superconductors
Acoustic plasmons found in hole-doped cuprate superconductors
Phys.org December 14, 2020 An international team of researchers (France, USA – University of Illinois, Stanford University, Binghamton University, SLAC National Accelerator Laboratory, University of Maryland, Italy, UK, Argentina, Japan) has confirmed the presence of acoustic plasmons in p-type cuprate superconductors and that they are primarily associated with the oxygen atoms. It seems that the collective charge excitations have strong preference in space, despite the fact that the charges associated with Cu and O atoms are strongly hybridized with each other. Understanding this may help us to clarify the ground state of the cuprate superconductors. This opens new opportunities to […]
Light pulses provide a new route to enhance superconductivity
Phys.org March 4, 2019 Under normal electron band theory, Mott insulators ought to conduct electricity, but they do not due to interactions among their electrons. An international team of researchers (Japan, Italy) used numerical methods to show that pulses of light could be used to turn these materials beyond simple conductors to superconductors due to an unconventional type of superconductivity known as “eta pairing” which is thought to involve repulsive interactions between certain electrons within the structure. The research provides new insights not only into the phenomenon of non-equilibrium dynamics but could lead to the development of new high-temperature superconductors…read […]
Bringing a hidden superconducting state to light
Science Daily February 16, 2018 An international team of researchers (Germany, USA – Brookhaven National Laboratory, UK) has detected a hidden state of electronic order in a layered material containing lanthanum, barium, copper, and oxygen (LBCO). When cooled to a certain temperature and with certain concentrations of barium, LBCO is known to conduct electricity without resistance, but now there is evidence that a superconducting state occurs above this temperature too. The discovery could help design better high-temperature superconductors… read more. TECHNICAL ARTICLE