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A single h-BN layer on Pt(1 1 1) |
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| Authors: | E. &#x avar, R. Westerstr m, A. Mikkelsen, E. Lundgren, A.S. Vinogradov, May Ling Ng, A.B. Preobrajenski, A.A. Zakharov,N. M rtensson |
| Affiliation: | aDepartment of Synchrotron Radiation Research, Institute of Physics, Lund University, Box 118, S-221 00 Lund, Sweden bV.A. Fock Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia cDepartment of Physics, Uppsala University, Box 530, 75121 Uppsala, Sweden dMAX-lab, Lund University, S-22100 Lund, Sweden |
| Abstract: | The structure and formation of an ultrathin hexagonal boron nitride (h-BN) film on Pt(1 1 1) has been studied by a combination of scanning tunneling microscopy, low energy electron diffraction, low energy electron microscopy, X-ray absorption and high resolution core level spectroscopy. The study shows that a single boron nitride layer is formed on Pt(1 1 1), resulting in a coincidence structure. High resolution scanning tunneling microscopy (STM) images of the h-BN ultrathin film display only one of the atomic species in the unit cell. Probing the boron and nitrogen related local density of states by near edge X-ray absorption fine structure measurements we conclude that the nitrogen sublattice is visible in STM images. The growth of the single hexagonal boron nitride layer by vapourized borazine in the pressure range of 1×10-6–1×10-8 at 800 °C is further studied by low energy electron microscopy, and reveals that the number of nucleation sites and the perfection of the growth is strongly pressure dependent. A model for the single, hexagonal, boron nitride layer on Pt(1 1 1) is proposed. |
| Keywords: | Low energy electron diffraction (LEED) Scanning tunneling microscopy Low index single crystal surfaces Surface structure Platinum |
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