Evidence of electron-phonon interaction in Al-substituted Mg 1-xAlxB2

T. Yokoo, T. Muranaka, M. Arai, K. Papagelis, K. Prassides, J. Taylor, S. M. Bennington, J. Akimitsu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Phonon density of states in Al substituted Mg1-xAl xB2 has been studied by means of inelastic neutron scattering experiments with pulsed neutron time-of-flight technique. Phonon dynamics have a significant role for realizing superconductivity in the recent discovered superconductor MgB2. We present a systematic investigation on generalized phonon density of states (PDOS) up to E = 120 meV on Al content of x = 0.1, 0.25, and 0.5. We have clearly observed a large effect on the PDOS by Al substitution; a large energy shift occurs around at 70 meV and 89 meV. We have also observed a visible increase of PDOS at a particular energy range below Tc. Those phonon states are related with E2g mode to be expected to have a strong coupling with the electron states at the Γ-A region.

Original languageEnglish
Pages (from-to)199-203
Number of pages5
JournalJournal of Superconductivity and Novel Magnetism
Volume17
Issue number2
DOIs
Publication statusPublished - 2004
Externally publishedYes

Keywords

  • Electron-phonon coupling
  • MgB
  • Neutron scattering
  • Phonon
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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