TY - JOUR
T1 - Anomalous variation of phonon Raman intensities near the metal-to-Mott-insulator transition in titanium oxide systems
AU - Katsufuji, T.
AU - Tokura, Y.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 1994
Y1 - 1994
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.50.2704
DO - 10.1103/PhysRevB.50.2704
M3 - Article
AN - SCOPUS:30244443605
SN - 0163-1829
VL - 50
SP - 2704
EP - 2707
JO - Physical Review B
JF - Physical Review B
IS - 4
ER -