Insulator-Metal transition in the Doped 3d1 Transition Metal Oxide LaTiO3

2003/09/16 by L. Craco, Craco, L., M. S. Laad +5
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.cond-mat/0309370

openalex publication_date 2003/09/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The doping induced insulator-metal transition in La_1-xSr_xTiO₃ is studied using the ab-initio LDA+DMFT method. Combining the LDA bandstructure for the actual, distorted structure found recently with multi-orbital DMFT to treat electronic correlations, we find: (i) ferro-orbital order in the Mott insulating state without orbital degeneracy, (ii) a continuous filling induced transition to the paramagnetic metal (PM) with x, and (iii) excellent quantitative agreement with published photoemission data for the case of 6% doping. Our results imply that this system can be described as a Mott-Hubbard system without orbital (liquid) degeneracy.

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