Electron-phonon coupling constants of twodimensional copper oxide-based high temperature superconductors

Research output: Contribution to journalArticle

Abstract

The electron-phonon coupling constant of the copper oxide-based high temperature superconductors in the van Hove scenario was calculated using three known models and by employing various acoustic data. Three expressions for the transition temperature from the models were used to calculate the constants. All three models assumed a logarithmic singularity in the density of states near the Fermi surface. The calculated electron-phonon coupling constant ranged from 0.06 to 0.28. The constants increased with the transition temperature indicating a strong correlation between electron-phonon coupling and superconductivity in these materials. These values were smaller than the values estimated for the conventional three-dimensional BCS theory. The results were compared with previous reports on direct measurements of electron-phonon coupling constants in the copper oxide based superconductors.

Original languageEnglish
Pages (from-to)18-22
Number of pages5
JournalASM Science Journal
Volume7
Issue number1
Publication statusPublished - 2013

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copper oxides
high temperature superconductors
electrons
transition temperature
BCS theory
trucks
Fermi surfaces
superconductivity
acoustics

Keywords

  • Acoustic methods
  • Electron-phonon coupling constant
  • Transition temperature models
  • Van hove scenario

ASJC Scopus subject areas

  • General

Cite this

Electron-phonon coupling constants of twodimensional copper oxide-based high temperature superconductors. / Abd. Shukor, Roslan; Lim, W. Y.

In: ASM Science Journal, Vol. 7, No. 1, 2013, p. 18-22.

Research output: Contribution to journalArticle

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