Commit 5afd3619 authored by T. van der Sar's avatar T. van der Sar
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Update 14_doping_and_devices.md - typo

parent 95ca23e1
......@@ -88,7 +88,7 @@ draw_classic_axes(ax, xlabeloffset=.2)
All donor/acceptor states at the same energy:
$$g_A(E) = N_A \delta(E-E_A),\quad g_D(E) = N_D \delta(E- E_D)$$
How large can $N_D/N_A$ be? The distance between donors should be such that the states don't overlap, so the distance must be much larger than 4 nm. Therefore **maximal** concentration of donors before donor band merges with conduction band is $N_D \lesssim (1Å/4\textrm{nm})^3 \sim 10^{-5}\ll N_C$.
How large can $N_D/N_A$ be? The distance between donors should be such that the states don't overlap, so the distance must be much larger than 4 nm. Therefore **maximal** concentration of donors before donor band merges with conduction band is $N_D \lesssim (1/4\textrm{nm})^3 \sim 10^{-5}\ll N_C$.
## Number of carriers
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