Topic
High-temperature superconductivity
About: High-temperature superconductivity is a research topic. Over the lifetime, 7263 publications have been published within this topic receiving 175377 citations. The topic is also known as: high-temperature superconductivity.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the authors reported the prediction of high temperature superconductivity in the family of pnictogen hydrides using first-principles calculations in combination with global optimization structure searching methods.
Abstract: The recent breakthrough discovery of unprecedentedly high temperature superconductivity of 203 K in compressed sulfur hydrides has stimulated significant interest in finding new hydrogen-containing superconductors and elucidating the physical and chemical principles that govern these materials and their superconductivity. Here we report the prediction of high temperature superconductivity in the family of pnictogen hydrides using first-principles calculations in combination with global optimization structure searching methods. The hitherto unknown high-pressure phase diagrams of binary hydrides formed by the pnictogens of phosphorus, arsenic, and antimony are explored, stable structures are identified, and their electronic, vibrational, and superconducting properties are investigated. We predict that SbH4 and AsH8 are high-temperature superconductors at megabar pressures, with critical temperatures in excess of 100 K. The highly symmetrical hexagonal SbH4 phase is predicted to be stabilized above about 15...
63 citations
TL;DR: In this article, the voltage vs magnetic-flux characteristics of a DC-SQUID using YBa2Cu3O7-δ film have been studied and shown to operate up to 72 K.
Abstract: Voltage vs magnetic-flux characteristics of a DC-SQUID using YBa2Cu3O7-δ film have been studied. YBa2Cu3O7-δ film SQUID was fabricated by lithographical patterning. The DC-SQUID operated up to 72 K.
63 citations
Journal Article•
TL;DR: In this paper, the electronic structure of electron doped iron-arsenide superconductors Ba(Fe{sub 1-x}Co{sub x}){sub 2]As{sub 2} has been measured with Angle Resolved Photoemission Spectroscopy.
Abstract: The electronic structure of electron doped iron-arsenide superconductors Ba(Fe{sub 1-x}Co{sub x}){sub 2}As{sub 2} has been measured with Angle Resolved Photoemission Spectroscopy. The data reveal a marked photon energy dependence of points in momentum space where the bands cross the Fermi energy, a distinctive and direct signature of three-dimensionality in the Fermi surface topology. By providing a unique example of high temperature superconductivity hosted in layered compounds with three-dimensional electronic structure, these findings suggest that the iron-arsenides are unique materials, quite different from the cuprates high temperature superconductors.
62 citations
TL;DR: In this paper, the authors present a technique for the investigation of local variations of the critical current density in large bulk superconductors, where the sample is not magnetized as a whole before the scan, but locally by a small permanent magnet, which is fixed near the Hall probe, during the scanning process.
Abstract: We present a novel technique for the investigation of local variations of the critical current density in large bulk superconductors. In contrast to the usual Hall probe scanning technique, the sample is not magnetized as a whole before the scan, but locally by a small permanent magnet, which is fixed near the Hall probe, during the scanning process. The resulting signal can be interpreted as a qualitative measure of the local shielding currents flowing at the surface.
62 citations
TL;DR: In this article, the time-resolved excited state ultrafast dynamics of single unit cell (1UC) FeSe films on SrTiO(3) with FeTe capping layers were investigated.
Abstract: We report the time-resolved excited state ultrafast dynamics of single unit cell (1 UC) thick FeSe films on SrTiO_{3} (STO), with FeTe capping layers. By measuring the photoexcited quasiparticles' density and lifetime, we unambiguously identify a superconducting (SC) phase transition, with a transition temperature T_{c} of 68 (-5/+2) K and a SC gap of Δ(0)=20.2±1.5 meV. The obtained electron-phonon coupling strength λ is as large as 0.48, demonstrating the likely crucial role of electron-phonon coupling in the high temperature superconductivity of the 1 UC FeSe on STO systems. We further find a 0.05 THz coherent acoustic phonon branch in the capping layer, which provides an additional decay channel to the gluing bosons.
62 citations