Sensors and“Smart” Molecular Nanostructures: Components for Future Information Technologies

Sensors Set ◽  
2008 ◽  
pp. 295-336
Author(s):  
Wolfgang Gpel
Author(s):  
А.В. Трифонов ◽  
И.В. Игнатьев ◽  
К.В. Кавокин ◽  
А.В. Кавокин ◽  
П.Ю. Шапочкин ◽  
...  

AbstractMechanisms of the suppression of the electron-hole exchange interaction in nonradiative excitons with a large in-plane wave vector in high-quality heterostructures with quantum wells are analyzed theoretically. It is shown that the dominant suppression mechanism is exciton-exciton scattering accompanied by the mutual spin flips of like carriers (either two electrons or two holes), comprising the excitons. As a result, the electron spin polarization in nonradiative excitons may be retained for a long time. The analysis of experimental data shows that this relaxation time can exceed one nanosecond. This long-term and optically controllable spin memory in an exciton reservoir may be of interest for future information technologies.


2021 ◽  
Author(s):  
Moritz Winter ◽  
Francisco J. T. Goncalves ◽  
Ivan Soldatov ◽  
Yangkun He ◽  
Belén Zéuniga Céspedes ◽  
...  

Abstract Skyrmionics materials hold the potential for future information technologies, such as racetrack memories. Key to that advancement are skyrmionics systems that exhibit high tunability and scalability, with stored information being easy to read and write by means of all-electrical techniques. Topological magnetic excitations, such as skyrmions and antiskyrmions give rise to a characteristic topological Hall effect (THE) in electrical transport. However, an unambiguous transport signature of antiskyrmions, in both thin films and bulk samples has been challenging to date. Here we apply magnetosensitive microscopy combined with electrical transport to directly detect the emergence of antiskyrmions in crystalline microstructures of Mn1.4PtSn at room temperature. We reveal the THE of antiskyrmions and demonstrate its tunability by means of finite sizes, field orientation, and temperature. Our atomistic simulations and experimental anisotropy studies demonstrate the link between antiskyrmions and a complex magnetism that consists of competing ferro- and antiferromagnetic as well as chiral exchange interactions.


Data organization is an area of research and development, which has, oddly enough given that this is the Information Age, stagnated almost entirely in the library field. With the massive addition of virtual collections and the steady expansion of print and multimedia publications, the desperate need to develop more efficient indices handling the organization of ever-larger amounts of data is mandatory for continued progress in any meaningful way of collection development. This field has been dominated by non-library organizations, such as governments and corporations, leaving libraries woefully behind. Eventually, massively joint collections developed in a mostly virtual environment, accessed mainly through networked portals such as through the Internet, must come to grips with a truly universal index that spans both the physical and virtual material. The days of LOC are gone—it is a labor intensive system totally unprepared to harness today's and tomorrow's information technology. The new indices must be primarily automated and user friendly, harnessing all levels of traditional inventory control—balancing each level’s weaknesses with their inherent strengths. We have the levels, we just need to re-formulate them into a stronger matrix, scalable to current and future information technologies. Outlined here is one such indexing technology: the KATIE Universal Indexing System. Surveyed in this chapter is a review of this driving technology and its applications, covering the NITA Methodology Stage-I, Stage-II, and Stage-III in its developmental process.


Author(s):  
Dmytro Kostenko ◽  
Viktoriia Oliinyk

The article is devoted to the study of the formation of intercultural competence of future specialists in the field of “Information Technology”, taking into account current trends in education in the context of globalization and strengthening intercultural ties. Various aspects of intercultural competence are considered. The relevance of the study of the problem of formation of intercultural competence of future specialists in the field of “Information Technology” in connection with the growing level of public demand for such specialists is emphasized. The essence of the debatable concepts “competence” and “competency” is specified. Keywords: intercultural competence; intercultural competency; readiness for intercultural communication; future specialists; competences; information technologies; personality; foreign languages; education.


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