Search for giant magnetic anisotropy in transition-metal dimers on defected hexagonal boron nitride sheet

ORAL

Abstract

For a magnetic units at the nanometer scale, one of the most important issues is how to hold thermal fluctuation of its magnetization, i.e., how to enhance its blocking temperature (T$_{\mathrm{\$ \mathunderscore B\$ }})$ to above 300K. Through systematic density functional calculations, the structural stability and magnetic properties of many transition-metal dimers embedded in a defected hexagonal boron nitride monolayer are investigated. We find twelve cases that may have magnetic anisotropy energies (MAEs) larger than 30 meV. In particular, Ir-Ir@Dh-BN has both large MAE (\textasciitilde 126 meV) and high structural stability, which makes it a promising candidate of magnetic unit in spintronics and quantum computing devices.

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Authors

  • Jie Li

    State Key Lab. of Surface Physics, Key Lab. of Computational Physical Sciences, and Dept. of Physics, Fudan Univ.

  • Hui Wang

    Dept. of Physics and Astronomy, Univ. of California

  • Jun Hu

    College of Physics, Optoelectronics and Energy, Soochow Univ.

  • Ruqian Wu

    Department of Physics and Astronomy, University of California, Irvine, CA, Dept. of Physics and Astronomy, University of California, UCI, Department of Physics and Astronomy, University of California, Department of Physics and Astronomy, University of California, Irvine, Dept. of Physics and Astronomy, Univ. of California