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Orbital selective coupling between Ni adatoms and graphene Dirac electrons

机译:Ni原子与石墨烯Dirac电子之间的轨道选择性耦合

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摘要

We investigate the coupling of Ni monomers and trimers to graphene by means of atomically resolved scanning tunneling microscopy (STM). The precise adsorption site of the adatoms is determined experimentally. STM images reveal characteristic nodal structures above the Ni adatoms and trimers on graphene. First-principles calculations combined with symmetry considerations explain our experimental results by an orbitally controlled interaction of the adatoms and clusters with the Dirac electrons in graphene.
机译:我们通过原子分辨扫描隧道显微镜(STM)研究了Ni单体和三聚体与石墨烯的偶联。吸附原子的精确吸附位置是通过实验确定的。 STM图像揭示了石墨烯上Ni吸附原子和三聚体上方的特征性结节结构。第一性原理计算与对称性考虑相结合,通过石墨烯中吸附原子和团簇与Dirac电子的轨道控制相互作用来解释我们的实验结果。

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  • 来源
    《Physical review》 |2012年第16期|p.161406.1-161406.5|共5页
  • 作者单位

    Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany;

    Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany;

    Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany;

    Ist Institute of Theoretical Physics, University of Hamburg, Jungiusstrasse 9, D-20355 Hamburg, Germany,Institut fuer Theoretische Physik, Universitaet Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany, Bremen Center for Computational Materials Science, Am Fallturm la, D-28359 Bremen, Germany;

    Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany;

    Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany;

    Ist Institute of Theoretical Physics, University of Hamburg, Jungiusstrasse 9, D-20355 Hamburg, Germany;

    Institute for Molecules and Materials, Radboud University of Nijmegen, Heijendaalseweg 135, NL-6525 AJ Nijmegen, The Netherlands;

    Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany;

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  • 正文语种 eng
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  • 关键词

    surface states, band structure, electron density of states; scanning tunneling microscopy (including chemistry induced with STM); impurity and defect levels; energy states of adsorbed species;

    机译:表面态;能带结构;态电子密度;扫描隧道显微镜(包括用STM诱导的化学反应);杂质和缺陷水平;吸附物质的能态;

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