Professor Hyun Myung Jang (MSE) and Seungwoo Song (MSE Ph.D. candi- date) discovered why LuMno3 has ferroe-lectricity using first-principles simulation. LuMno3 is a kind of multiferroic which has ferroelectricity and magnetism at the same time. Until now, people did not know the scientific reason. They analyzed the movement of atoms in a phase in which polarity occurs even when there is no electric polarity. They based their experiment on the observation that there is a large gap between the temperature that makes structural polarity and the temperature making electric polarity.
They explained that electric polarity is induced by coupling symmetric and asymmetric movement of atoms. At 1560°C, symmetric movement has more effect so electric polarity is not shown. But at 1020°C  , the coupling makes electric polarity. They also discovered that the phenomenon also occurs in a hexagonal system. It is expected to be applied to D-RAM (which stores big data in small size) or hard disk and F-RAM.
The result is receiving attention from academia and it was selected for the front cover of Journal of Materials Chemistry C.