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Hydrogen and its Complexes in Silicon

100%
Dobaczewski L., Bonde Nielsen K., Gosciñski K., Andersen O.
Acta Physica Polonica A
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2000
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vol. 98
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issue 3
231-239
EN
In this study the technique of Laplace transform (high resolution) deep level transient spectroscopy combined with the uniaxial stress method has been used to study a symmetry and the defect reconfiguration kinetics (the stress induced alignment) of some forms of hydrogen-related centres. We have confirmed the trigonal symmetry of the defect related to the isolated bond centred hydrogen. When hydrogen decorates the vacancy-oxygen pair (the A centre) the apparent defect orthorhombic symmetry is not lowered as a result of a very high hydrogen jumping rate between two unsaturated broken bonds of the vacancy. We also show that the stress-induced defect alignment in some cases can be related to the same microscopic mechanism of the hydrogen motion as it is for the diffusion process.
2
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Single Temperature Scan Determination of Defect Parameters in DLTS Experiment

100%
Dobaczewski L., Kancleris Z., Bonde Nielsen K., Peaker A. R.
Acta Physica Polonica A
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1997
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vol. 92
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issue 4
724-726
EN
Many point and extended defects in silicon, and other semiconducting materials, have been relatively well characterised by the standard DLTS technique. In this method the activation energy of carrier emission from the defect is calculated after multiple temperature scans. In this paper we demonstrate a new approach to the technique, in which after a single temperature scan the complete Arrhenius plot can be constructed for defects present in the sample with considerable concentrations. This method is much faster, accurate, and offers a much higher resolution in comparison with the standard DLTS method.
3
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Lattice Sitting of Platinum Atoms in Diluted SiGe Alloys

76%
Dobaczewski L., Bonde Nielsen K., Nylandsted Larsen A., Lundsgaard Hansen J., Gościński K., Peaker A.
Acta Physica Polonica A
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1998
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vol. 94
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issue 2
297-299
EN
In this report we present high-resolution spectra obtained with a use of the Laplace transform deep level transient spectroscopy for platinum diffused into dilute (0-5% of Ge) SiGe alloys. Very significant changes are observed in the spectra associated with the transition metals as the germanium content is altered. We interpret these spectra in terms of the configurations of silicon and germanium atoms surrounding the transition metal. In order to explain the observed behaviour both the first and second nearest neighbour shells are considered.
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