Diffusion 1 Electron fluid 1 Electron systems Electrons 1 Gallium arsenide 1 Heavy holes 1 High mobility 1 Hydrodynamic properties 1 Hydrodynamics 1 III-V semiconductors 1 Light holes 1 Mesoscopics 1 Photoexcited holes 1 Photogenerated holes 1 Three-component mixtures 1 Viscosity 1 Viscous flow 1 article 1 diffusion coefficient 1 electron 1 hydrodynamics 1 viscosity 1