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.

*Work at Fudan was supported by the Chinese National Science Foundation (11474056) and National Basic Research Program of China (2015CB921400). Work at UCI was supported by DOE-BES (Grant No. DE-FG02-05ER46237).

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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