X-Git-Url: https://hackdaworld.org/gitweb/?p=lectures%2Flatex.git;a=blobdiff_plain;f=posic%2Ftalks%2Fdefense.tex;h=e1c938b85facf32da14401b1e18b7b98d7952070;hp=bfd92d02b17584803e5572eb17ac4fe9f45a1131;hb=f48ab8ab048458b22a9aecfe7b47c7f07bd5a019;hpb=b72d5fabe9b016843d069c4478310ea67e76fc47 diff --git a/posic/talks/defense.tex b/posic/talks/defense.tex index bfd92d0..e1c938b 100644 --- a/posic/talks/defense.tex +++ b/posic/talks/defense.tex @@ -335,15 +335,15 @@ SiC thin films by MBE \& CVD \vspace{-0.5cm} -\begin{center} -\color{red} -\framebox{ -{\footnotesize\color{black} - Mismatch in \underline{thermal expansion coeefficient} - and \underline{lattice parameter} w.r.t. substrate -} -} -\end{center} +%\begin{center} +%\color{red} +%\framebox{ +%{\footnotesize\color{black} +% Mismatch in \underline{thermal expansion coeefficient} +% and \underline{lattice parameter} w.r.t. substrate +%} +%} +%\end{center} \vspace{0.1cm} @@ -373,16 +373,25 @@ Ion beam synthesis (IBS) of burried 3C-SiC layers in Si\hkl(1 0 0) \end{minipage} } \begin{minipage}{5.5cm} -\begin{center} -{\footnotesize -No surface bending effects\\ -High areal homogenity\\[0.1cm] -$\Downarrow$\\[0.1cm] -Synthesis of large area SiC films possible -} -\end{center} + \includegraphics[width=5.8cm]{ibs_3c-sic.eps}\\[-0.2cm] + \begin{center} + {\tiny + XTEM: single crystalline 3C-SiC in Si\hkl(1 0 0) + } + \end{center} \end{minipage} +%\begin{minipage}{5.5cm} +%\begin{center} +%{\footnotesize +%No surface bending effects\\ +%High areal homogenity\\[0.1cm] +%$\Downarrow$\\[0.1cm] +%Synthesis of large area SiC films possible +%} +%\end{center} +%\end{minipage} + \end{slide} \begin{slide} @@ -451,8 +460,6 @@ Synthesis of large area SiC films possible \end{slide} -% contents - \begin{slide} \headphd @@ -714,6 +721,8 @@ r = \unit[2--4]{nm} \begin{slide} +% contents + \headphd {\large\bf Outline @@ -2224,10 +2233,12 @@ High C \& low T implants \headphd {\large\bf - Summary / Conclusions + Summary and Conclusions } -\scriptsize +\footnotesize + +\vspace{0.1cm} \framebox{ \begin{minipage}{12.3cm} @@ -2237,19 +2248,12 @@ High C \& low T implants \begin{itemize} \item Point defects excellently / fairly well described by DFT / EA - \item C$_{\text{sub}}$ drastically underestimated by EA - \item EA predicts correct ground state: - C$_{\text{sub}}$ \& \si{} $>$ \ci{} - \item Identified migration path explaining - diffusion and reorientation experiments by DFT - \item EA fails to describe \ci{} migration: - Wrong path \& overestimated barrier + \item Identified \ci{} migration path + \item EA drastically overestimates the diffusion barrier \end{itemize} \item Combinations of defects \begin{itemize} \item Agglomeration of point defects energetically favorable - by compensation of stress - \item Formation of C-C unlikely \item C$_{\text{sub}}$ favored conditions (conceivable in IBS) \item \ci{} \hkl<1 0 0> $\leftrightarrow$ \cs{} \& \si{} \hkl<1 1 0>\\ Low barrier (\unit[0.77]{eV}) \& low capture radius @@ -2262,12 +2266,11 @@ High C \& low T implants \begin{minipage}[t]{12.3cm} \underline{Pecipitation simulations} \begin{itemize} - \item High C concentration $\rightarrow$ amorphous SiC like phase \item Problem of potential enhanced slow phase space propagation \item Low T $\rightarrow$ C-Si \hkl<1 0 0> dumbbell dominated structure \item High T $\rightarrow$ C$_{\text{sub}}$ dominated structure \item High T necessary to simulate IBS conditions (far from equilibrium) - \item Precipitation by successive agglomeration of \cs (epitaxy) + \item Increased participation of \cs{} in the precipitation process \item \si{}: vehicle to form \cs{} \& supply of Si \& stress compensation (stretched SiC, interface) \end{itemize} @@ -2275,7 +2278,7 @@ High C \& low T implants } \begin{center} -{\color{blue} +{\color{blue}\bf \framebox{Precipitation by successive agglomeration of \cs{}} } \end{center} @@ -2284,9 +2287,10 @@ High C \& low T implants \begin{slide} - {\large\bf - Acknowledgements - } +\headphd +{\large\bf + Acknowledgements +} \vspace{0.1cm} @@ -2296,32 +2300,35 @@ High C \& low T implants \underline{Augsburg} \begin{itemize} - \item Prof. B. Stritzker (accomodation at EP \RM{4}) - \item Ralf Utermann (EDV) + \item Prof. B. Stritzker + \item Prof. F. Haider + \item Ralf Utermann \end{itemize} \underline{Berlin/Brandenburg} \begin{itemize} - \item PD Volker Eyert (Ref) + \item PD V. Eyert \end{itemize} \underline{Helsinki} \begin{itemize} - \item Prof. K. Nordlund (MD) + \item Prof. K. Nordlund \end{itemize} \underline{Munich} \begin{itemize} - \item Bayerische Forschungsstiftung (financial support) + \item Bayerische Forschungsstiftung \end{itemize} \underline{Paderborn} \begin{itemize} - \item Prof. J. Lindner (SiC) - \item Prof. G. Schmidt (DFT + financial support) - \item Dr. E. Rauls (DFT + SiC) + \item Prof. J. Lindner + \item Prof. G. Schmidt + \item Dr. E. Rauls \end{itemize} +\vspace{0.1cm} + \begin{center} \framebox{ \bf Thank you for your attention!