added lattice matching

This commit is contained in:
aj 2019-11-11 15:33:04 +00:00
parent 90110f82fb
commit 73e377ff33
3 changed files with 50 additions and 5 deletions

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@ -374,7 +374,7 @@ Material
\begin_inset Text \begin_inset Text
\begin_layout Plain Layout \begin_layout Plain Layout
Lattice Constant (Å) Lattice Constant, α (Å)
\end_layout \end_layout
\end_inset \end_inset
@ -414,7 +414,7 @@ GaAs
\begin_inset Text \begin_inset Text
\begin_layout Plain Layout \begin_layout Plain Layout
5.653 5.6532
\end_layout \end_layout
\end_inset \end_inset
@ -434,7 +434,7 @@ InP
\begin_inset Text \begin_inset Text
\begin_layout Plain Layout \begin_layout Plain Layout
5.869 5.8687
\end_layout \end_layout
\end_inset \end_inset
@ -452,6 +452,14 @@ InP
\begin_layout Plain Layout \begin_layout Plain Layout
Lattice constants for prospective well and barrier materials Lattice constants for prospective well and barrier materials
\begin_inset CommandInset citation
LatexCommand cite
key "new_semiconductor_materials_archive"
literal "false"
\end_inset
\begin_inset CommandInset label \begin_inset CommandInset label
LatexCommand label LatexCommand label
name "tab:Lattice-constants" name "tab:Lattice-constants"
@ -479,7 +487,39 @@ name "tab:Lattice-constants"
In order to compute a compound lattice constant for InGaAs, Vegard's law In order to compute a compound lattice constant for InGaAs, Vegard's law
can be applied. can be applied.
Vegard's law provides an approximation for the lattice constant of a solid Vegard's law provides an approximation for the lattice constant of a solid
solution by solution by finding the weighted average the individual lattice constants
by composition ratio and is given by:
\end_layout
\begin_layout Standard
\begin_inset Formula
\[
\alpha_{A_{(1-x)}B_{x}}=(1-x)\alpha_{A}+x\alpha_{B}
\]
\end_inset
\end_layout
\begin_layout Standard
Applying this to the prospective well material gives the following,
\end_layout
\begin_layout Standard
\begin_inset Formula
\[
\alpha_{In_{0.53}Ga_{0.47}As}=0.53\cdotp6.0583+0.47\cdotp5.6532=5.8679
\]
\end_inset
\end_layout
\begin_layout Standard
This shows that to 4 significant figures the composition of InGaAs is lattice
matched to InP to within 0.001Å which is sufficient for this application.
\end_layout \end_layout
\begin_layout Subsubsection \begin_layout Subsubsection

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@ -10,6 +10,11 @@ pages = "154,165",
publisher = "IEEE", publisher = "IEEE",
title = "Quantum Well Infrared Photodetector Technology and Applications", title = "Quantum Well Infrared Photodetector Technology and Applications",
volume = "20", volume = "20",
year = "2014-11", year = "2014-11"
} }
@misc{new_semiconductor_materials_archive,
title={NSM Archive - Physical Properties of Semiconductors},
url={http://matprop.ru/},
journal={New Semiconductor Materials Archive}, publisher={Ioffe Institute}
}