Viscous-liquid-like electron state in the dilute-metal-like n-type ${\mathrm{Hg}}_{0.8}$${\mathrm{Cd}}_{0.2}$Te

We have measured photoconductivity and hot-electron-carrier properties of pure n-type ${\mathrm{Hg}}_{0.8}$${\mathrm{Cd}}_{0.2}$Te in high magnetic fields. In this dilute-metal-like semiconductor the low-temperature magnetotransport is solely governed by an activated mobility of electrons. Obviously, the predicted magnetic-field-induced Wigner condensation of free electrons is established by a state similar to a viscous liquid.