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Tetrahedrally coordinated compound semiconductors occur in two crystallographic allotropes: zincblende and wurtzite. Zincblende materials exhibit a single cleavage face: The (110) surface consisting of equal numbers of anions and cations which form zig-zag chains directed along <110> directions in the surface. Wurtzite materials exhibit two cleavage faces, both consisting of equal numbers of...
Experimental and theoretical results concerning the statistical properties of the conductance of electron systems at very low temperatures are reported. In the metallic regime the conductance fluctuations are of the order of e2/h, independent of the size, and other parameters that characterize the system. The magnitude of these universal conductance fluctuations are determined by symmetry...
Three paramagnetic arsenic antisite-related defects in GaAs, which were produced by low temperature electron irradiation and subsequent annealing, have been studied by optically detected electron paramagnetic resonance (ODEPR) and optically detected electron nuclear double resonance (ODENDOR) using the magnetic circular dichroism of the optical absorption (MCDA). Its structure models have been proposed:...
For the optical analysis of heterogeneous materials the microtopology of the samples plays an important role. In the long wavelength limit (i.e. light wavelengths much larger than the typical size of the inhomogeneities) effective medium theories give the desired connection between the component properties and the average ‘effective’ optical behaviour. On the basis of the general Bergman representation...
Even if the present pace of progress continues, the prospects for microelectronics beyond the year 2000 will not be limited by technological constraints. Equally positive statements can be made about future developments in applications. Thus, the computational power of a chip can be boosted by about four orders of magnitude to 105–106 MIPS on the basis of verified structures. However, this...
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