New Limit on the Electron Electric Dipole Moment

We present the result of our most recent search for $T$ violation in ${}^{205}\mathrm{Tl}$, which is interpreted in terms of an electric dipole moment of the electron ${d}_{e}$. We find ${d}_{e}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}(6.9\ifmmode\pm\else\textpm\fi{}7.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}28}e\mathrm{cm}$, which yields an upper limit $|{d}_{e}|\ensuremath{\le}1.6\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}27}e\mathrm{cm}$ with $90%$ confidence. The present apparatus is a major upgrade of the atomic beam magnetic-resonance device used to set the previous limit on ${d}_{e}$.