Metal-insulator transition in CMR materials

1999/03/15 by V. N. Smolyaninova, X. C. Xie, Smolyaninova, V. N. +10
Biochemistry, Genetics and Molecular Biology · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Geomagnetism and Paleomagnetism Studies #Magnetic and transport properties of perovskites and related materials #Strongly Correlated Electrons (cond-mat.str-el) #Theoretical and Computational Physics #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.cond-mat/9903238

5 pages REVTeX, 4 figures included, submitted to PRB

openalex publication_date 1999/03/15 · arxiv created 2000/02/11 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report on resistivity measurements in La_0.67Ca_0.33MnO₃ and Nd_0.7Sr_0.3MnO₃ thin films in order to elucidate the underlying mechanism for the CMR behavior. The experimental results are analyzed in terms of quantum phase transition ideas to study the nature of the metal-insulator transition in manganese oxides. Resistivity curves as functions of magnetization for various temperatures show the absence of scaling behavior expected in a continuous quantum phase transition, which leads us to conclude that the observed metal-insulator transition is most likely a finite temperature crossover phenomenon.

Related

• Detecting percolative metal-insulator transition in manganites by resistive relaxation
• Field Induced Transition from Metal to Insulator in the CMR Manganites
• Universal behavior of transition temperatures Vs residual resistivity in Mn site doped La-Ca-Mn-O perovskites
• Metal to insulator transition in manganites - optical conductivity changes up to 24 eV
• Current driven discontinuous insulator-metal transition and colossal low-field magnetoresistance in Sm0.6Sr0.4MnO3