Search academic texts

Information × Registration Number 0219U005088, 0115U002975 , R & D reports Title Investigation of non-equilibrium charge carriers and phonons in complex nanostructures based on the А3В5 semiconductor compounds. popup.stage_title Head Poroshin Volodymyr Mykolayovich, Доктор фізико-математичних наук Registration Date 10-05-2019 Organization Institute of physics NASU popup.description2 The interaction features of electrons with vibrations of the crystal lattice (phonons) in the course of their drift in quantum wells of the semiconductor heterostructures under action of applied lateral electric field and caused by interaction with the acoustoelectric instabilities have been investigated. The most valuable obtained results: For the heterostructures with quantum wells based on the polar semiconductors it was experimentally shown that durations of formation and decay of the acoustoelectric domains which appear under the lateral electric field due to interaction of the hot charge carriers with the acoustic phonons are approximately equal. It is shown that use of the field pulses with duration less than the domain incubation time as well as use of the alternate polarity pulses enables to avoid domain formation. It is theoretically shown that interaction features of electrons drifting in quantum wells under action of the applied lateral electric field with the polarized vibrations of the crystal lattice result in effective (~40%) excitation of the coherent phonons of such type. In addition these lattice vibrations cause the electric current oscillations in the terahertz frequency range. Product Description popup.authors Більовський Павло Антонович Вайнберг Віктор Володимирович Винославський Михайло Миколайович Пилипчук Олександр Сергійович Порошин Володимир Миколайович popup.nrat_date 2020-04-02 Close