Figure 1. (IMAGE) Science China Press Caption Schematic structures of 2D bimetal phosphates (MIMIIP2X6, MI and MII atoms are different metal elements, X=O, S, Se, Te). (a) Top view. (b) Side view of paraelectric phase. (c) Side view of ferroelectric phases with opposite polarization (P). (d)(e) Energy versus polarization of two ferroelectric metals (AuHfP2O6 and AuZrP2O6), showing the possible ferroelectric-paraelectric transition. Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.