Probing charge/orbital correlation in La1.2Sr1.8Mn2O7 by Raman spectroscopy

Ki Ichi Yamamoto*, Tsuyoshi Kimura, Tadahiko Ishikawa, Takuro Katsufuji, Yoshinori Tokura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Raman spectra have been investigated for a single crystal of La1.2Sr1.8Mn2O7 that shows colossal magnetoresistance around the Curie temperature Tc = 126K. Several broad phonon peaks grow with decrease of temperature down to TC but disappear below TC, which can be clearly ascribed to a change in the charge/orbital correlation by comparison with the spectra for the charge/orbital ordered states of the layered manganites (La0.5Sr1.5MnO4 and LaSr2Mn2O7). Such a real-space charge density fluctuation is also observed to cause the low-energy diffuse Raman response, the B1g component of which is critically suppressed below TC as well.

Original languageEnglish
Pages (from-to)2538-2541
Number of pages4
Journaljournal of the physical society of japan
Issue number8
Publication statusPublished - 1999 Aug
Externally publishedYes


  • Charge/orbital ordering
  • Colossal magnetoresistance (CMR)
  • LaSrMnO
  • Layered manganites
  • Raman scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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