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Hydrogen-induced ferromagnetism in two-dimensional Pt dichalcogenides

机译:二维Pt二卤化氢中的氢感应铁磁性

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摘要

Electronic, structural, and magnetic properties of Pt dichalcogenide monolayers are investigated using first-principle calculations. We find that hydrogenation lifts the spin degeneracy in narrow antibonding Pt 5d subband electrons and transforms the nonmagnetic semiconductors PtX_2 (X = S,Se,Te) into ferromagnetic metals, PtX_2-1H; neither strain nor thin-film edges are necessary to support the transition. The trend towards ferromagnetism is most pronounced for X = S, decreasing with increasing atomic weight of the chalcogens.
机译:使用第一性原理计算研究了Pt二卤化钨单层的电子,结构和磁性。我们发现,氢化可提升窄反键Pt 5d子带电子中的自旋简并性,并将非磁性半导体PtX_2(X = S,Se,Te)转变为铁磁性金属PtX_2-1H;应变和薄膜边缘都不是支撑过渡的必要条件。 X = S时,铁磁性趋势最明显,随着硫族元素原子量的增加而降低。

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  • 来源
    《Physical review》 |2016年第10期|104426.1-104426.5|共5页
  • 作者单位

    Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA;

    Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA;

    Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA;

    Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA;

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