Использование дистанционных образовательных технологий на курсах повышения квалификации

В статье описан опыт использования дистанционных образовательных технологий на курсах повышения квалификации специалистов предприятий — членов саморегулируемых организаций (СРО) в области строительства, энергетики и теплоснабжения, посредством сети Интернет с использованием системы дистанционного обучения «WebSET»

"Apparent PT-symmetric terahertz photoconductivity in the topological phase of Hg1−xCdxTe-based structures"

We show that the terahertz (THz) photoconductivity in the topological phase of Hg1-xCdxTe-based structures exhibits the apparent PT- (parity-time) symmetry whereas the P-symmetry and the T-symmetry, separately, are not conserved. Moreover, it is demonstrated that the P- and T-symmetry breaking may not be related to any type of the sample anisotropy. This result contradicts the apparent symmetry arguments and means that there exists an external factor that interacts with the sample electronic system and breaks the symmetry. We show that deviations from the ideal experimental geometry may not be such a factor

Terahertz Photoconductivity in Hg1−x Cd x Te near the transition from the direct to inverted spectrum

For the Hg1-xCdxTe-based structures, it is shown that the transition from the direct to inverted spectrum is accompanied by the sign change for the signals related to the terahertz photoconductivity and to the magnetophotogalvanic effect. Within the range of chemical compositions corresponding to the inverted spectrum, the photoconductivity kinetics exhibits specific features, which can result from the surface topological states