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@@ -417,7 +417,7 @@ Einstein formula $D = k_B T_e \tau/m^* \approx (1\div2)\cdot{10}^{-3}$ m$^2$/s
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$\tau=1$~\textit{fs} is the collision time, $m^* = 0.18 m_e$ is the effective
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mass), where $T_e \approx 2*{10}^4$ K for $N_e$ close to $N_{cr}$ \cite{Ramer2014}. It
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means that during the pulse duration ($\approx 50$~\textit{fs}) the diffusion
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-length will be around $5--10$~nm for $N_e$ close to $N_{cr}$.
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+length will be around 5--10~nm for $N_e$ close to $N_{cr}$.
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\begin{figure}[ht!]
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\centering
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