Terahertz Spectroscopy and DFT Analysis of Phonon Dynamics of the Layered Van der Waals Semiconductor Nb<sub>3</sub><i>X</i><sub>8</sub> (<i>X</i> = Cl, I)Jangwon Kim, Hyoung Joon Choi, Jonghyeon Kim et al.|ACS Omega|2023Cited by 19