Phase Separation of the Electron-Hole Drop in〈111〉-Stressed Ge

We present a theoretical study of the electron-hole drop containing both "hot" and "cold" carriers in $〈111〉$-stressed Ge at $T=0\mathrm{}$. We predict that for certain values of the stress this system phase separates into two degenerate Fermi liquids, one containing "cold" and the other containing both "hot" and "cold" electrons. It should be possible to verify this prediction experimentally.