Calculated sound velocity and elastic moduli changes of FeTe0.5Se0.5 at the superconducting transition

Roslan Abd. Shukor, S. K. Chen, Edmund H.H. Lim

Research output: Contribution to journalArticle

Abstract

The room temperature sound velocity in FeTe0.5Se0.5 superconductor has been measured using the pulsed-echo overlap ultrasonic technique. The samples were prepared using the solid-state reaction method at ambient pressure. Using these ultrasonic measurements we performed calculations that showed a step discontinuity in the bulk modulus, [formula presented]=4 ppm, Young's modulus, [formula presented]=8 ppm and longitudinal sound velocity, [formula presented]=2 ppm at Tc. The calculated acoustic Debye temperature, θD=334 K indicated that FeTe0.5Se0.5 is slightly softer than the copper oxide based superconductor and hence the lower Tc. The calculated electron-phonon coupling in the two-dimensional van Hove scenario is, λvH=0.024.

Original languageEnglish
Pages (from-to)7-9
Number of pages3
JournalSolid State Communications
Volume259
DOIs
Publication statusPublished - 1 Jun 2017

Fingerprint

Acoustic wave velocity
acoustic velocity
Superconducting materials
modulus of elasticity
Elastic moduli
Ultrasonic measurement
Debye temperature
Copper oxides
ultrasonics
Solid state reactions
Ultrasonics
Acoustics
copper oxides
trucks
bulk modulus
Electrons
echoes
discontinuity
specific heat
solid state

Keywords

  • Elastic properties
  • Electron-phonon coupling
  • FeTeSe
  • Superconductors
  • Young modulus

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Calculated sound velocity and elastic moduli changes of FeTe0.5Se0.5 at the superconducting transition. / Abd. Shukor, Roslan; Chen, S. K.; Lim, Edmund H.H.

In: Solid State Communications, Vol. 259, 01.06.2017, p. 7-9.

Research output: Contribution to journalArticle

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