Dynamical Properties of a Large Electron-Hole Drop in Germanium. I. Kinetics of a Strain-Confined Large Electron-Hole Drop and Its Clinging Exciton System

For the exciton system coexisting with a strain-confined large electron-hole drop in germanium, a time constant as long as 1500 µs is observed by far-infrared. Combining this with the decay data of the drop, a quasi-steady state between the drop and its clinging exciton system is confirmed. A relevant excitonic atmosphere is defined around the drop with an effective thickness dependent on the drop radius and temperature. The critical temperature of the liquid T c is estimated to be 6 K.