Influence of an oxygen monolayer at the Fe/MgO interface on the transport properties in Fe/MgO/Fe(001) magnetic tunnel junctions, Zermatten, P.-J., Bonell, F., Andrieu, S., Chshiev, M., Tiusan, C., Schuhl, A., Gaudin, G., Applied Physics Express, 5, 023001 (2012)