Utilization of a Hubbard U Model to Understand the Valence Band Photoelectron Data for the High-Temperature Superconductors

Abstract

The valence band photoelectron spectra are interpreted within a Hubbard model, The 9.5 eV 'mystery' peak in the photoelectron spectra for YBa2Cu3O7 is identified as arising from a state with two holes localized on nearest neighbor oxygen atoms. Hubbard U parameters are obtained from the data and found to be larger than expected for metallic systems. Keywords: Superconductivity; Photoelectron spectroscopy; Hubbard model; Electron correlation.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1988
Accession Number
ADA201986

Entities

People

  • David E. Ramaker

Organizations

  • George Washington University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Chemical Engineering
  • Chemistry
  • Crystal Structure
  • Energy Bands
  • Engineering
  • High Temperature
  • High Temperature Superconductors
  • Materials
  • Materials Science
  • Military Research
  • Mining Engineering
  • New York
  • Photoelectric Emission
  • Photoelectron Spectra
  • Solid State Physics
  • Spectra
  • Valence Bands

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Superconducting Magnet Technology

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene