Atomic scale investigation of clean and epi-grown Si(001) surfaces using scanning tunneling microscopy

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buir.advisorEllialtıoğlu, Recai
dc.contributor.authorÖzer, H. Özgür
dc.date.accessioned2016-01-08T20:13:51Z
dc.date.available2016-01-08T20:13:51Z
dc.date.issued1996
dc.descriptionAnkara : Department of Physics and the Institute of Engineering and Science of Bilkent University, 1996.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 1996.en_US
dc.descriptionIncludes bibliographical references leaves 60-65.en_US
dc.description.abstractIn this thesis, clean and epi-grown Si(001)(2x1)surfaces are analyzed by Scanning Tunneling Microscopy (STM). The STM and Ultra High Vacuum System (UHV) in which the microscope is installed, are described. A brief history of the studies on the reconstruction and fundamental features of the Si(001) surface is also given. First, the sample and tip preparation techniques were optimized. Sample preparation method, which includes both ex situ chemical and in situ heating cleaning procedures, was found not to give routinely the clean and atomically flat surfaces, because of the criticality of the temperature values used during heat treatments. The monoatomic steps, dimer rows, defects such as missing dimer and dimer groups, were observed on clean Si(001) surfaces. Double height step formation due to contamination was also detected on a few samples. Buckling of dimers, which is believed to be due mainly to either the high defect density or tip-surface interaction, was observed on one sample. Si and Ge were grown epitaxially on the silicon substrate, with 0.11 ML and 3.2 ML coverages, respectively. The Si growth on Si(001) was found to occur as island formation because of the low substrate temperature (ca. 300 degrees C). Strong shape anisotropy and diffusional anistropy in the growth have been observed. On the other hand, the large coverage of Ge on Si(001) at a relatively high substrate temperature (ca. 500 degrees C) resulted in step flow growth rather than individual island formation on the terraces.en_US
dc.description.provenanceMade available in DSpace on 2016-01-08T20:13:51Z (GMT). No. of bitstreams: 1 1.pdf: 78510 bytes, checksum: d85492f20c2362aa2bcf4aad49380397 (MD5)en
dc.description.statementofresponsibilityÖzer, H Özgüren_US
dc.format.extentix, 65 leaves illustrationsen_US
dc.identifier.urihttp://hdl.handle.net/11693/17833
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectScanning 'runneling Microscopeen_US
dc.subjectUltra High Vacuumen_US
dc.subjectSi(001)(‘2 x i ) reconstructionen_US
dc.subjectEpitaxial growthen_US
dc.subject.lccQH212.S35 O94 1996en_US
dc.subject.lcshScanning tunneling microscopy.en_US
dc.subject.lcshAtomic force microscopy.en_US
dc.titleAtomic scale investigation of clean and epi-grown Si(001) surfaces using scanning tunneling microscopyen_US
dc.typeThesisen_US
thesis.degree.disciplinePhysics
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

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