Anomalous variation of phonon Raman intensities near the metal-to-Mott-insulator transition in titanium oxide systems

T. Katsufuji, Y. Tokura

研究成果: Article査読

42 被引用数 (Scopus)

抄録

Raman-scattering spectra were investigated for strongly correlated electron systems, La1-xSrxTiO3 and Y1-xCaxTiO3, which undergo a metal-to-Mott-insulator transition under variation of the band filling. The phonon spectra decrease in their intensity as the system approaches the metal-insulator phase boundary, accompanied by a critical enhancement of the value of the effective mass, and almost disappear in the insulating phase. We found that the phonon spectral intensity in the metallic region approximately scales with (n/m*)2, n and m* being the density and effective mass of conduction carriers.

本文言語English
ページ(範囲)2704-2707
ページ数4
ジャーナルPhysical Review B
50
4
DOI
出版ステータスPublished - 1994
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学

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