Filling dependence of electronic properties on the verge of metal–Mott-insulator transition in Sr1xLaxTiO3

Y. Tokura, Y. Taguchi, Y. Okada, Y. Fujishima, T. Arima, K. Kumagai, and Y. Iye
Phys. Rev. Lett. 70, 2126 – Published 5 April 1993
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Abstract

Introducing holes (or partly eliminating electrons) in Mott-Hubbard insulator LaTiO3 (with 3d1 configuration) can be carried out by partial substitution of La with Sr, which produces the strongly correlated metallic phase. Systematic variation of electronic properties in Sr1xLaxTiO3 was investigated as a function of the 3d band filling (x) by measurements of resistivity, Hall coefficient, magnetic susceptibility, and specific heat. Up to the vicinity of the metal-insulator phase boundary (xc∼0.95), Sr1xLaxTiO3 behaves as a Fermi liquid system where the carrier mass and scattering rate critically increase as the x=1 (LaTiO3) insulator is approached.

  • Received 22 September 1992

DOI:https://doi.org/10.1103/PhysRevLett.70.2126

©1993 American Physical Society

Authors & Affiliations

Y. Tokura, Y. Taguchi, Y. Okada, Y. Fujishima, and T. Arima

  • Department of Physics, University of Tokyo, Tokyo 113, Japan

K. Kumagai

  • Department of Physics, Hokkaido University, Sapporo 060, Japan

Y. Iye

  • Institute for Solid State Physics, University of Tokyo, Tokyo 106, Japan

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Vol. 70, Iss. 14 — 5 April 1993

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