Magnetic-Field Induced Metal-Insulator Transition in SrTiO<sub>3−δ</sub>

ORAL

Abstract

Metallic samples of SrTiO3−δ with charge-carrier concentrations of n = 8.6 × 1016 cm−3 and 2.0 × 1017 cm−3 are shown to exhibit magnetic-field-induced metal-insulator transitions. Landau levels emerge in the magnetic field, and their energy spacing is comparable to the Fermi and thermal energies. The convergence of these energy scales plays an important role in the observed behavior. A simple parallel-conduction model represents the data below the metal-insulator transition well.

*This material is based upon work supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. 2439625 and NSF Grant DMR-2411583.Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

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Presenters

  • John J. Neumeier

    • Montana State University

Authors

  • John J. Neumeier

    • Montana State University

  • Felipe S Oliveira

    • Instituto de Física Gleb Wataghin (IFGW) - Unicamp

  • Mario S da Luz

    • Universidade Federal do Triângulo Mineiro

  • Carlos A. M. dos Santos

    • Escola de Engenharia de Lorena, USP-Lorena