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

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

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

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
Volume68
Issue number8
DOIs
Publication statusPublished - 1999 Aug
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Probing charge/orbital correlation in La<sub>1.2</sub>Sr<sub>1.8</sub>Mn<sub>2</sub>O<sub>7</sub> by Raman spectroscopy'. Together they form a unique fingerprint.

  • Cite this