A.S. Everhardt 1, S. Zhou 1, N. Domingo 2, G. Catalan 2, 3, B. Noheda 1
1 Zernike Institute for Advanced Materials, University of Groningen, The Netherlands, Groningen, Netherlands, 2 Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, Barcelona, Spain, Barcelona, Spain, 3 Institute of Science and Technology Campus, Universitat Autonoma de Barcelona, Bellaterra, 08193 Barcelona, Spain; 3 ICREA, 08193 Barcelona, Spain, Barcelona, Spain
