Far-infrared spectroscopy of spin excitations and Dzyaloshinskii-Moriya interactions in a Shastry-Sutherland compound SrCu${}_2$(BO${}_3$)$_2

T. Rõõm, D. Hüvonen, U. Nagel +2

We have studied spin excitation spectra in the Shastry-Sutherland model compound SrCu${}_2$(BO${}_3$)${}_2$ in magnetic fields using far-infrared Fourier spectroscopy. The transitions fr…