\documentclass[prb,preprint,tightenlines,amsmath,showpacs]{revtex4}

%
% macros
\def\k{{\bf k}}
\def\R{{\bf R}}

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\begin{center}
\textbf{Erratum: \emph{Ab-initio} calculation of the anomalous Hall
conductivity\\ by Wannier interpolation [Phys. Rev. B 74, 195118 (2006)]}
\vskip 0.5cm
Xinjie Wang, Jonathan R. Yates, Ivo Souza, and David Vanderbilt
\end{center}

\date{September 16, 2007}

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\pacs{71.15.Dx, 71.70.Ej, 71.18.+y, 75.50.Bb, 75.47.-m.}

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Four minor errors are corrected as follows.
{\it (i)} The right-hand side of Eq.~(5) should have been preceded
by a factor of 1/2.
{\it (ii)} The right-hand side of Eq.~(34) should be multiplied by a minus sign.
{\it (iii)} The vertical axis labels of Fig.~3 should read $\Omega_z(k)$
instead of $\Omega^2(k)$.
{\it (iv)} Eqs.~(A5-6) were oversimplified.  The corrected versions are
%
\begin{equation}
\tag{A5}
\widetilde{\Omega}_{nm,\alpha\beta}^{({\rm W})}(\k)=\sum_\R e^{i\k\cdot\R}\;
   w_{nm,\alpha\beta}(\R) ,
\end{equation}
%
\begin{equation}
\tag{A6}
w_{nm,\alpha\beta}(\R) =
-i \sum_{\R'l}
   \langle{\bf 0}n|\hat{r}_\alpha|\R' l\rangle
   \langle\R' l|\hat{r}_\beta |\R m\rangle
+i \sum_{\R'l}
   \langle{\bf 0}n|\hat{r}_\beta |\R' l\rangle
   \langle\R' l|\hat{r}_\alpha|\R m\rangle .
\end{equation}
%
In addition, the sentence preceding these equations should have
stated only that Eq.~(40) needs to be replaced by a corresponding
equation for $\widetilde{\Omega}_{\alpha\beta}$.


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