Conflicting evidence for ferroelectricity

Affiliations

• ¹ nanomat/QMAT/CESAM, Université de Liège, and European Theoretical Spectroscopy Facility, B-4000 Liège, Belgium.
• ² Institut Néel, CNRS and Grenoble Alpes University, F-38042 Grenoble, France.
• ³ Laboratory for the Chemistry of Novel Materials, University of Mons, 7000 Mons, Belgium.
• ⁴ Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, E-08193 Cerdanyola del Vallès, Spain.
• ⁵ Department of Chemistry, Life Science and Environmental Sustainability, Parma University and INSTM-UdR Parma, 43124 Parma, Italy.
• ⁶ Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany.
• ⁷ Serveis Científico-Tècnics, Campus de Montilivi, University of Girona, E-17071 Girona, Spain.
• ⁸ CNR-IOM-Democritos National Simulation Centre and International School for Advanced Studies (SISSA), I-34136 Trieste, Italy.