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Surface properties of Hafnium diboride(0 0 0 1) as determined by X-ray photoelectron spectroscopy and scanning tunneling microscopy |
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| Authors: | C. L. Perkins R. Singh M. Trenary T. Tanaka Yu. Paderno |
| Affiliation: | a Department of Chemistry M/C 111, Room 4500, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, IL 60607 7061, USA b National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki 305 0044, Japan c Institute for Problems in Materials Science, Academy of Sciences of Ukraine, 3 Kryzanovsky Str., Kiev 252680, Ukraine |
| Abstract: | The surface structure and properties of the HfB2(0 0 0 1) (Hafnium diboride, HfB2) surface have been investigated with X-ray photoelectron spectroscopy, low energy electron diffraction (LEED), and scanning tunneling microscopy (STM). Annealing temperatures above 1900°C produce a sharp (1×1) LEED pattern, which corresponds to STM images showing flat (0 0 0 1) terraces with a very low contamination level separated by steps 3.4 Å in height, corresponding to the separation of adjacent Hf planes in the HfB2 bulk structure. For lower annealing temperatures, extra p(2×2) spots were observed with LEED, which correspond to intermediate terraces of a p(2×1) missing row structure as observed with STM. |
| Keywords: | Hafnium Surface structure, morphology, roughness, and topography Scanning tunneling microscopy Low index crystal surfaces X-ray photoelectron spectroscopy |
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