Reconstruction of the cleavage faces of tetrahedrally coordinated compound semiconductors.- Resonant tunneling diodes: The effect of structural properties on their performance.- Reproducible quantum conductance fluctuations in disordered systems.- Raman scattering in II-VI compounds.- On the microscopic structures of three arsenic antisite-related defects in gallium arsenide studied by optically detected electron nuclear double resonance.- The use of effective medium theories in optical spectroscopy.- Systems on chips: The microelectronics challange of the next 20 years.