Single top-quark production at ATLAS

We present the result of measurements of single top-quark production in the t- and Wt-channels at 7 TeV proton-proton collisions with the ATLAS detector at the Large Hadron Collider, from which the CKM matrix element |Vtb| is extracted. For the case of the t-channel, measurements of the single top-quark and top-antiquark cross sections and their ratio are also determined. In addition, a search for FCNC in the single top t-channel and a tb resonances in the single top s-channel are also performed.