Toward Functionalized Ultrathin Oxide Films: The Impact of Surface Apical Oxygen oleh Judith Gabel, Matthias Pickem, Philipp Scheiderer, Lenart Dudy, Berengar Leikert, Marius Fuchs, Martin Stübinger, Matthias Schmitt, Julia Küspert, Giorgio Sangiovanni, Jan M. Tomczak, Karsten Held, Tien‐Lin Lee, Ralph Claessen, Michael Sing