Anomalous Hall conductivity of antiperovskite GaNMn3

ORAL

Abstract

The interplay between lattice, charge, and spin degree of freedom in antiperovskite compounds gives rise to a range of functional properties including those interesting for spintronics applications. In particular, GaNMn3 has garnered attention due to possibility of tuning the magnetic phases, such as non-collinear antiferromagnetic Γ5g phase and collinear ferrimagnetic M-1 phase, by chemical doping and hydrostatic pressure. Here, using first-principles density-functional theory calculations, we explore the anomalous Hall conductivity of antiperovskite GaNMn3 in different magnetic configurations. In the ferromagnetic M-1 phase, to the anomalous Hall conductivity emerges due to the broken time reversal symmetry, whereas in the non-collinear antiferromagnetic Γ5g phase with zero magnetization the anomalous Hall conductivity results from the broken time reversal/mirror reflection symmetry combination. We calculate the magnitude of the anomalous Hall conductivity in both phases and discuss the underlying physics associated with this phenomenon.

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Presenters

  • Gautam Gurung

    Department of Physics and Astronomy, University of Nebraska Lincoln

Authors

  • Gautam Gurung

    Department of Physics and Astronomy, University of Nebraska Lincoln

  • Ding-Fu Shao

    Department of Physics and Astronomy, University of Nebraska Lincoln, Department of Physics and Astronomy, Univ of Nebraska - Lincoln

  • Tula Paudel

    Department of Physics and Astronomy, University of Nebraska Lincoln, University of Nebraska-Lincoln, Department of Physics and Astronomy, Univ of Nebraska - Lincoln

  • Evgeny Tsymbal

    Department of Physics and Astronomy, University of Nebraska Lincoln, Univ of Nebraska - Lincoln, Department of Physics and Astronomy, Univ of Nebraska - Lincoln, Physics and Astronomy, Univ of Nebraska - Lincoln, University of Nebraska-Lincoln, Department of Physics and Astronomy, University of Nebraska-Lincoln