Theoretical/Computational Studies of High-Temperature Superconductivity from Quantum Magnetism

Abstract

The PI has carried out theoretical and computational research on iron-selenide high-Tc superconductors. The PI has found a hidden spin density wave (hSDW) ground state over the iron 3dxz/3dyz orbitals that shows the correct electron-type Fermi surface pockets at the corner of the folded Brillouin zone upon doping by electrons. The exchange of hidden spin fluctuations between two electrons results in an instability to S+- superconductivity at electron doping, with isotropic Cooper pairs that alternate in sign between visible electron Fermi surface pockets and faint hole Fermi surface pockets. This prediction resolves the puzzling observation of an S-wave energy gap by angle-resolved photoemission spectroscopy (ARPES) in iron-selenide superconductors.

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Document Details

Document Type
Technical Report
Publication Date
May 27, 2021
Accession Number
AD1137000

Entities

People

  • Jose Rodriguez

Organizations

  • California State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Band Structures
  • Brillouin Zones
  • Crystal Lattices
  • Crystal Structure
  • Density Functional Theory
  • Electrons
  • Elements
  • Energy
  • Energy Bands
  • Energy Gaps
  • Fermi Surfaces
  • Fermions
  • High Temperature
  • Scientific Research
  • Spin Resonance
  • Subatomic Particles
  • Waves

Fields of Study

  • Physics

Readers

  • Astronomy/Astrophysics
  • Plasma Physics / Magnetohydrodynamics
  • Superconducting Magnet Technology

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Quantum Computing
  • Space