The metal-to-insulator transition in La1-xSrxVO3 thin films

ORAL

Abstract

Changing the composition x of the quaternary compound La1-xSrxVO3 allows continuous tuning of the electronic properties between the Mott insulator LaVO3, exhibiting a coupled spin and orbital ordered state below 140 K, and the paramagnetic correlated metal SrVO3. The ability to grow La1-xSrxVO3 in a self-regulated manner by hybrid molecular beam epitaxy irrespective of composition x enables an excellent control over the A-to-B site cation ratio, therefore minimizing the amount of disorder in these films[1]. We discuss the temperature dependent magnetotransport phenomena as a function of composition x with focus on the effects near the quantum critical point obtained at x~0.25. These trends are then discussed in contrast to the results obtained from films with same composition grown under nonstoichiometric conditions to elucidate the interplay between disorder effects and electron correlation in the vicinity of a quantum critical point.

[1] M. Brahlek, et al Appl. Phys. Lett. 109, 101903 (2016)

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Presenters

  • Joseph Roth

    Materials Science and Engineering, Pennsylvania State Universtiy, Pennsylvania State University, Materials Science and Engineering, Pennsylvania State University

Authors

  • Joseph Roth

    Materials Science and Engineering, Pennsylvania State Universtiy, Pennsylvania State University, Materials Science and Engineering, Pennsylvania State University

  • Matthew Brahlek

    Material Science, Pennsylvania State University, Pennsylvania State University, Physics, Pennsylvania State Univ, Materials Science and Engineering, Pennsylvania State University, Department of Materials Science and Engineering, Pennsylvania State University, Materials Science, Pennsylvania State University

  • Lei Zhang

    Pennsylvania State University, Materials Science and Engineering, Pennsylvania State University

  • Roman Engel-Herbert

    Department of Materials Science and Engineering, Pennsylvania State Univ, Material Science, Pennsylvania State University, Physics, Pennsylvania State University, Materials Science and Engineering, Pennsylvania State Universtiy, Pennsylvania State University, Physics, Pennsylvania State Univ, Materials Science and Engineering, Pennsylvania State University, Department of Materials Science and Engineering, Pennsylvania State University, Materials Science, Pennsylvania State University