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Quasifreestanding single-layer hexagonal boron nitride as a substrate for graphene synthesis

机译：准独立式单层六方氮化硼作为石墨烯合成的基质

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摘要

We demonstrate that freeing a single-atom thick layer of hexagonal boron nitride (h-BN) from tight chemical bonding to a Ni(111) thin film grown on a W(l 10) substrate can be achieved by intercalation of Au atoms into the interface. This process has been systematically investigated using angle-resolved photoemission spectros-copy, x-ray photoemission, and absorption techniques. It has been demonstrated that the transition of the h-BN layer from the "rigid" into the "quasifreestanding" state is accompanied by a change in its lattice constant. Using chemical vapor deposition, graphene has been successfully synthesized on the insulating, quasifreestanding h-BN monolayer. We anticipate that the in situ synthesized weakly interacting graphene/h-BN double layered system could be further developed for technological applications and may provide perspectives for further inquiry into the unusual electronic properties of graphene.
机译：我们证明，通过将金原子嵌入到W（l 10）衬底中，可以从紧密化学键合到生长在W（l 10）衬底上的Ni（111）薄膜上释放单原子厚的六方氮化硼（h-BN）厚层。接口。已使用角度分辨光发射光谱仪，X射线光发射和吸收技术系统地研究了此过程。已经证明，h-BN层从“刚性”到“准独立”状态的转变伴随着其晶格常数的变化。通过化学气相沉积，已成功在绝缘的准自立式h-BN单层上合成了石墨烯。我们预期原位合成的弱相互作用石墨烯/ h-BN双层系统可以进一步开发用于技术应用，并可以为进一步研究石墨烯的异常电子特性提供前景。

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  • 来源
    《Physical review》 |2010年第7期|p.075415.1-075415.6|共6页
  • 作者

    D. Usachov; V. K. Adamchuk; D. Haberer; A. Grueneis; H. Sachdev; A. B. Preobrajenski; C. Laubschat; D. V. Vyalikh;

  • 作者单位

    St. Petersburg State University, St. Petersburg 198504, Russia;

    rnSt. Petersburg State University, St. Petersburg 198504, Russia;

    rnIFW Dresden, P.O. Box 2701/6, D-01171 Dresden, Germany;

    rnIFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany Faculty of Physics, Vienna University, Strudlhofgasse 4, 1090 Wien, Austria;

    rnAnorganische Chemie 8.11, Universitaet des Saarlandes, 66041 Saarbrticken, Germany;

    rnMAX-lab, Lund University, P.O. Box 118, 22100 Lund, Sweden;

    rnInstitute of Solid State Physics, Dresden University of Technology, D-01062 Dresden, Germany;

    rnSt. Petersburg State University, St. Petersburg 198504, Russia Institute of Solid State Physics, Dresden University of Technology, D-01062 Dresden, Germany;

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