Ansermet, J. P.Rytz, D.Chatelain, A.Hochli, U. T.Weibel, H. E.2010-04-012010-04-012010-04-01198110.1088/0022-3719/14/30/018https://infoscience.epfl.ch/handle/20.500.14299/49092Surface-Layer in Ferroelectric KTa1-xNbxO3text::journal::journal article::research article