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Title:Surface studies of group IV-VI layered crystals
Author(s):Fabian, Walter
Doctoral Committee Chair(s):Brown, Frederick C.
Department / Program:Physics
Discipline:Physics
Degree:Ph.D.
Genre:Dissertation
Subject(s):group IV-VI layered crystals
surface structure
low energy electron diffraction (LEED)
atomic planes
Abstract:The surface structure of TiS2 has been investigated by low energy electron diffraction (LEED). No surface reconstruction was observed and comparison of LEED intensity data with theory suggests a slight outward relaxation of atomic planes at the surface. The LEED pattern for a crystal cleaved at a temperature below the charge density wave transition exhibited a 2ao x 2ao surface superlattice. The electronic band structures for TiS2e and TiS2 have been investigated by angle resolved photoemission spectroscopy. Excitation is provided by He I (21.2 eV) and He II (40.8 eV) ultraviolet radiation. The results indicate that TiSe2 a semimetal with a band overlap of less than 0.25 eV, while TiSi2 a semiconductor. These measured bands are in good agreement with recent theoretical band calculations.
Issue Date:1978
Genre:Dissertation / Thesis
Type:Text
Language:English
URI:http://hdl.handle.net/2142/25596
Rights Information:1978 Walter Fabian
Date Available in IDEALS:2011-06-30
Identifier in Online Catalog:356085


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