Tunneling through Charge transfer heterostructure of CrI3

ORAL

Abstract

Two dimensional ferromagnetic insulator CrI3 have attracted a lot of attention because of its interesting properties including tunneling magnetoresistance in a Van der Waals heterostructure. Using the first-principles methods, we calculate the spin-dependent transport through a CrI3-based tunnel junction and find that the tunneling current is 100% spin polarized. In zero bias regime, switching between the ferromagnetic and antiferromagnetic configurations of CrI3 leads to the tunneling magnetoresistance of 9800%. The transmission is mediated by the states located at the k-points away from the high symmetry points in the Brillouin zone and modulated by the distribution of the k-dependent decay states in the barrier. When biased, both the spin polarization and tunneling magnetoresistance are enhanced. This behavior persists even when the CrI3 barrier is as thin as two monolayers. Our calculations open up the possibility achieving 100% spin polarized current using conventional metallic electrodes, thereby broadening design space beyond 2D Van der Walls heterostructures.

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Presenters

  • Tula Paudel

    Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, University of Nebraska - Lincoln

Authors

  • Tula Paudel

    Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, University of Nebraska - Lincoln

  • Evgeny Y Tsymbal

    Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, University of Nebraska - Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska - Lincoln, Institute of Physics