Experimental and computational insight into the properties of the lattice-mismatched structures: Monolayers of h-BN and graphene on Ir(111)

D. Usachov, A. Fedorov, O. Vilkov, V. K. Adamchuk, L. V. Yashina, L. Bondarenko, A. A. Saranin, A. Grüneis, and D. V. Vyalikh
Phys. Rev. B 86, 155151 – Published 26 October 2012

Abstract

We report a comparative study of the synthesis and the structural and electronic properties of hexagonal boron nitride (h-BN) and graphene layers grown on the Ir(111) surface. By performing photoemission (PE) experiments time-dependently and supplementing them by low-energy electron diffraction (LEED) data, we demonstrate the differences and similarities of their formation, and we show the temperature regimes which allow these materials to be created with high crystalline quality. It has been demonstrated that synthesis at low temperatures leads to the formation of disordered domains of h-BN as well as graphene flakes on the metallic surface. The LEED patterns of such samples reveal a complex structure which indeed can be easily interpreted by using the model presented here. The angle-resolved PE study of h-BN/Ir(111) demonstrates the presence of replicated electronic states, which are quite similar to those detected and widely discussed for the graphene/Ir(111) system. On the basis of these results and the corresponding model calculations, we argue that the appearance of these replicated bands is mainly caused by the geometrical corrugation of the system.

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  • Received 28 August 2012

DOI:https://doi.org/10.1103/PhysRevB.86.155151

©2012 American Physical Society

Authors & Affiliations

D. Usachov1,*, A. Fedorov1,2, O. Vilkov1, V. K. Adamchuk1, L. V. Yashina3, L. Bondarenko4,5, A. A. Saranin4,5, A. Grüneis2,6, and D. V. Vyalikh1,7

  • 1St. Petersburg State University, 198504 St. Petersburg, Russia
  • 2IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany
  • 3M.V. Lomonosov Moscow State University, Leniskie Gory 1/3 199991 Moscow, Russia
  • 4Institute of Automation and Control Processes, 5 Radio Street, 690041 Vladivostok, Russia
  • 5School of Natural Sciences, Far Eastern Federal University, 690950 Vladivostok, Russia
  • 6Faculty of Physics, Vienna University, Strudlhofgasse 4, 1090 Wien, Austria
  • 7Institute of Solid State Physics, Dresden University of Technology, D-01062 Dresden, Germany

  • *usachov.d@gmail.com

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Issue

Vol. 86, Iss. 15 — 15 October 2012

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