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

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

*この研究の対応する著者

研究成果: Article査読

19 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)2538-2541
ページ数4
ジャーナルjournal of the physical society of japan
68
8
DOI
出版ステータスPublished - 1999 8
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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「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」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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