Optical spectroscopy of the charge-ordering transition

T. Katsufuji, T. Tanabe, T. Ishikawa, Y. Fukuda, T. Arima, Y. Tokura

研究成果: Article査読

171 被引用数 (Scopus)

抄録

Optical spectra of a single crystal of (Formula presented)(Formula presented)(Formula presented), which undergoes a charge-ordering transition at (Formula presented)∼240 K, have been investigated for wide ranges of photon energy (0.008-3 eV) and temperature (10-480 K). The opening of a charge gap as well as change of the gap magnitude (2Δ) with temperature is clearly observed below (Formula presented), with an anomalously large ratio of 2Δ(T=0)/(Formula presented)(Formula presented) (∼13). Conspicuous spectral change with temperature is also observed above (Formula presented) over the energy region up to 2 eV, which suggests persistent fluctuation of the charge ordering or formation of small polarons above (Formula presented).

本文言語English
ページ(範囲)R14230-R14233
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
54
20
DOI
出版ステータスPublished - 1996 1 1
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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