Effect of localization in quantum wells and quantum wires on heavy-light hole mixing and acceptor binding energy

The variational method taking into account the complex valence band structure is used to study the effect of localization in quantum wells and quantum wires on the acceptor binding energy. Trial functions that make possible tracing of the transition from the bulk material to narrow quantum wells and quantum wires of small radius are constructed. The possibility of the appearance of an unsteadily varying dependence of the acceptor binding energy on the characteristic dimension of the system is shown.     

Damping of bloch oscillations in one-, two-, and three-dimensional quantum-dot superlattices

In the preceding paper by the same authors, the density-matrix formalism was used to derive a quantum kinetic equation describing the damping of Bloch oscillations (BOs) in perfect one-, two-, and three-dimensional quantum-dot superlattices (QDSLs) and the conditions were determined under which the only process of the charge-carrier scattering by phonons in 2D and 3D QDSLs that contributes to the BO damping is the acoustic-phonon scattering within the transverse minibands of the Stark ladder of the carrier states. In this paper, the possibilities of suppressing this remaining scattering channel are analyzed. It is shown that the BO damping time in 2D and 3D QDSLs at room temperature may exceed the oscillation period by a factor of several hundreds and the conditions necessary for such strong suppression of the scattering are revealed. This makes a considerable difference between the QDSLs and the quantum-well superlattices, where, in reality, the BOs damping over a single oscillation period at room temperature.     

Stablization of tahe viscose in the manufacture of artificial fibres

Conclusions A structure and algorithm have been developed for fan adaptive system for stabilizing the composition of viscose in the manufacture of artificial fibres.This system has been introduced into the ACS TP for the manufacture of viscose tire cord at the Svetlogordsk Khimvolokno PO.Translated from Khimicheskie Volokna, No. 5, pp. 25–26, September–October, 1986.     

Heat exchange in a plasma chemical reactor with multijet mixing chamber

The article presents the results of the investigation of the heat exchange in a multijet plasma chemical reactor in dependence on the hydrodynamic conditions and design dimensions of the conical mixing chamber.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 49, No. 1, pp. 128–132, July, 1985.