Long range repulsive interactions in Fe on epitaxial graphene

ORAL

Abstract

The understanding of metal nucleation on graphene is essential for promising future applications, especially of magnetic metals which can be used in spintronics. A common method to study the grown morphology is to measure the nucleated island density n as a function of growth parameters. Surprisingly the growth of Fe on graphene is found not to follow classical nucleation: n is unexpectedtly high, it increases continuously with the deposited amount $\theta $ and shows no temperature dependence. These unusual results indicate the presence of long range repulsive interactions. Kinetic Monte Carlo simulations and DFT calculations support this conclusion.

*This work was supported by the Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division of the US Department of Energy (USDOE), under Contract No. DE-AC02-07CH11358 with the US Department of Energy.

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Authors

  • Myron Hupalo

    • Ames Laboratory-U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA
    • Ames Laboratory - U.S. Department of Energy, Iowa State University

  • Xiaojie Liu

    • State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, Jilin 130021, P. R.
    • Beijing Computational Science Research Center, Beijing 100084, China

  • Steven Binz

    • Ames Laboratory - U.S. Department of Energy, Iowa State University

  • Cai-Zhuang Wang

    • Ames Lab
    • Ames Laboratory-U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA
    • Ames Laboratory, DOE \& Iowa State University
    • Iowa State University
    • Ames laboratory--US DOE and Iowa State University
    • Ames Laboratory
    • Ames Laboratory - U.S. Department of Energy, Iowa State University
    • Ames Lab, US DOE

  • Wen-Cai Lu

    • State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, Jilin 130021, P. R.

  • Patricia Thiel

    • Ames Laboratory - U.S. Department of Energy, Iowa State University

  • Kai-Ming Ho

    • Ames Lab
    • Ames Laboratory-U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA
    • Ames Laboratory, DOE \& Iowa State University
    • Iowa State University
    • Ames Laboratory
    • Ames Laboratory - U.S. Department of Energy, Iowa State University

  • Edward Conrad

    • School of Physics Georgia Institute of Technology, Atlanta, Georgia 30332, USA
    • Georgia Tech
    • Georgia Institute of Technology, Atlanta, GA, 30332

  • Michael Tringides

    • Ames Laboratory-U.S. Department of Energy, and Department of Physics and Astronomy, Iowa State University, Ames, Iowa, 50011, USA
    • Ames Laboratory - U.S. Department of Energy, Iowa State University