Evolution of optical properties of chromium spinels CdCr${}_2$O${}_4$, HgCr${}_2$S${}_4$, and ZnCr${}_2$Se${}_4$ under high pressure

K. Rabia, L. Baldassarre, J. Deisenhofer +2

We report pressure-dependent reflection and transmission measurements on ZnCr${}_2$Se${}_4$, HgCr${}_2$S${}_4$, and CdCr${}_2$O${}_4$ single crystals at room temperature over a broad spectral…