Terahertz Dielectric Analysis and Spin-Phonon Coupling in Multiferroic GeV${}_4$S${}_8$

Matthew T. Warren, G. Pokharel, A. D. Christianson +2

We present an investigation of the multiferroic lacunar spinel compound GeV${}_4$S${}_8$ using time-domain terahertz spectroscopy. We find three absorptions which either appear or shif…