X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=posic%2Ftalks%2Fdpg_2008.tex;h=5349eac542dd8b8afd6ffa09fdb8e8ddd6cb642a;hb=49f1ea0ef08a54fb99739f04a420e689daef7c4f;hp=1f6bce4cc820951f3fb19b86d22b89e49661f974;hpb=aa5433fe4c9c534360371ed7489d64c3f9e22c3f;p=lectures%2Flatex.git diff --git a/posic/talks/dpg_2008.tex b/posic/talks/dpg_2008.tex index 1f6bce4..5349eac 100644 --- a/posic/talks/dpg_2008.tex +++ b/posic/talks/dpg_2008.tex @@ -138,7 +138,7 @@ \item Results gained by simulation \begin{itemize} \item Interstitials in silicon - \item $SiC$-precipitation experiments + \item SiC-precipitation experiments \end{itemize} \item Conclusion / Outlook \end{itemize} @@ -186,9 +186,11 @@ \end{minipage} \begin{center} - \[5a_{SiC}=4a_{Si} \quad \Rightarrow \quad + \[ + \textrm{Silicon density: } \quad + 5a_{SiC}=4a_{Si} \quad \Rightarrow \quad \frac{n_{SiC}}{n_{Si}}=\frac{\frac{4}{a_{SiC}^3}}{\frac{8}{a_{Si}^3}}= - \frac{5^3}{2\cdot4^3}=97,66\% + \frac{5^3}{2\cdot4^3}={\color{cyan}97,66}\,\% \] \end{center} @@ -235,7 +237,7 @@ Simulation details } - \vspace{16pt} + \vspace{20pt} Interstitial experiments: @@ -254,9 +256,10 @@ \item random positions (critical distance check) \end{itemize} \item Relaxation time: $2\, ps$ + \item Optional heating-up \end{itemize} - \begin{picture}(0,0)(-210,-65) + \begin{picture}(0,0)(-210,-85) \includegraphics[width=6cm]{unit_cell.eps} \end{picture} @@ -308,6 +311,14 @@ Si self-interstitial experiments: + {\footnotesize + {\bf Note:} + \begin{itemize} + \item $r_{cutoff}^{Si-Si}=2.96>\frac{5.43}{2}$ + \item Bond length near $r_{cutoff} \Rightarrow$ small bond strength + \end{itemize} + } + \vspace{8pt} \small @@ -316,7 +327,8 @@ \underline{Tetrahedral} \begin{itemize} \item $E_F=3.41\, eV$ - \item $r_{cutoff}^{Si-Si}=2.96>\frac{5.43}{2}$ + \item essentialy tetrahedral\\ + bonds \end{itemize} \end{minipage} \hspace{0.3cm} @@ -324,15 +336,15 @@ \underline{110 dumbbell} \begin{itemize} \item $E_F=4.39\, eV$ - \item Small bond strength + \item essentially 4 bonds \end{itemize} \end{minipage} \hspace{0.3cm} \begin{minipage}[t]{4.0cm} \underline{Hexagonal} \begin{itemize} - \item $E_F=4.48\, eV$ - \item unstable for $T\ne 0\,K$ + \item $E_F^{\star}=4.48\, eV$ + \item unstable! \end{itemize} \end{minipage} @@ -356,6 +368,14 @@ Results } + \vspace{8pt} + + Si self-interstitial \underline{random insertion} experiments: + + \vspace{8pt} + + foo + \end{slide} \begin{slide} @@ -374,6 +394,7 @@ \underline{Tetrahedral} \begin{itemize} \item $E_F=2.67\, eV$ + \item tetrahedral bond \end{itemize} \end{minipage} \hspace{0.3cm} @@ -381,12 +402,14 @@ \underline{110 dumbbell} \begin{itemize} \item $E_F=1.76\, eV$ + \item C forms 3 bonds \end{itemize} \end{minipage} \hspace{0.3cm} \begin{minipage}[t]{4.0cm} \underline{Hexagonal} \begin{itemize} + \item $E_F\sim5.6\, eV$ \item unstable! \end{itemize} \end{minipage} @@ -400,11 +423,27 @@ \includegraphics[width=3.8cm]{c_in_si_int_dumbbell_0.eps} \end{minipage} \begin{minipage}{4.3cm} - %\includegraphics[width=3.8cm]{si_self_int_hexa_0.eps} + \includegraphics[width=3.8cm]{c_in_si_int_hexa_0.eps} \end{minipage} \end{slide} +\begin{slide} + + {\large\bf + Results + } + + \vspace{8pt} + + Carbon \underline{random insertion} experiments: + + \vspace{8pt} + + bar + +\end{slide} + \begin{slide} {\large\bf