Lowest frequency mode in Raman susceptibility: 2-propanol from ambient to supercritical condition Yuko Amo, Takuya Hasegawa Sato, Yasuo Kameda and Takeshi Usuki Eur. Phys. J. B, 93 1 (2020) 6 Published online: 15 January 2020 DOI: 10.1140/epjb/e2019-100145-1