11:30 〜 11:45 ▲ [21a-W641-10] Hysteresis of the Electrostatic Potential of (GeTe)2 Sb2Te3 Superlattice Grains Measured by Scanning Probe Spectroscopy 〇Bolotov Leonid1、Tada Tetsuya1、Saito Yuta1、Tominaga Junji1 (1.AIST)