Binary ionic crystals, such as NaCl, are non-polar due to directionless ionic bonding interactions. Here, the authors show that polarity can be developed by using superalkali/superhalogen ions as building blocks, leading to ionic supersalts with ferroelectricity, ferroelasticity or even triferroicity.
- Yaxin Gao
- Menghao Wu
- Puru Jena
