Raman scattering study of Cu(Ge1-xSix)O3

Norio Ogita, Yasuhiro Tsunezumi, Jun Akimitsu, Masayuki Udagawa

Research output: Contribution to journalArticle

Abstract

Temperature and magnetic field dependence of Raman scattering spectra of Cu(Ge1-xSix)O3 has been measured for x = 0, 0.005, 0.008, 0.01, 0.015 and 0.02. For x≠0, zone-folded phonons due to the unit cell doubling appear at higher temperature (Tl) than the spin-Peierls transition temperature (TSP) and Tl increases with an increase of x. The coupling between magnetic fluctuation and phonon is estimated from the peak at about 100 cm-1 using the Fano formula, and the obtained coupling is almost independent of x. These results show that the suppression of TSP by Si-doping is mainly caused by the dimensional change of the magnetic interactions from one to three dimensions. The magnetic field dependence clarifies that the peak at 30 cm-1 is the soft phonon mode, not the SP gap excitation.

Original languageEnglish
Pages (from-to)832-834
Number of pages3
JournalPhysica B: Condensed Matter
Volume263-264
DOIs
Publication statusPublished - Mar 1999
Externally publishedYes

Fingerprint

Superconducting transition temperature
Raman scattering
transition temperature
Raman spectra
Magnetic fields
spin temperature
Magnetic couplings
Phonons
magnetic fields
phonons
Temperature distribution
temperature distribution
Doping (additives)
retarding
cells
excitation
interactions
Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Raman scattering study of Cu(Ge1-xSix)O3 . / Ogita, Norio; Tsunezumi, Yasuhiro; Akimitsu, Jun; Udagawa, Masayuki.

In: Physica B: Condensed Matter, Vol. 263-264, 03.1999, p. 832-834.

Research output: Contribution to journalArticle

Ogita, Norio ; Tsunezumi, Yasuhiro ; Akimitsu, Jun ; Udagawa, Masayuki. / Raman scattering study of Cu(Ge1-xSix)O3 . In: Physica B: Condensed Matter. 1999 ; Vol. 263-264. pp. 832-834.
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