Ferroelectric Smectic C Liquid Crystal Phase with Spontaneous Polarization in the Direction of the Director. - Kikuchi, Hirotsugu; Nishikawa, Hiroya; Matsukizono, Hiroyuki; Iino, Shunpei; Sugiyama, Takeharu; Ishioka, Toshio; Okumura, Yasushi (Advanced Science, 2024)