http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Iurii P. Shabaev,Natalia P. Mironova,Iurii V. Poliakov 한국외국어대학교(글로벌캠퍼스) 러시아연구소 2022 REGION Vol.11 No.1
This article analyzes the outlooks and attitudes of youth in the so-called Finno-Ugric republics of Russia. It is based on a set of surveys we carried out in these republics in 2017–20 as well as on official statistical data and other sources. Our analysis demonstrates that the multifaceted crisis in these regions seriously impacts the attitudes and outlooks of youth, causing a rise in oppositional attitudes, a loss of trust in regional political institutions, and other negative consequences. On the other hand, ethnic traditions and ethnic identity do not represent a particular topic of concern for these young people. Therefore the majority of them are uninterested in ethnic organizations.
Temperature and Magnetic-Field Dependence of Radiative Decay in Colloidal Germanium Quantum Dots
Robel, Istvá,n,Shabaev, Andrew,Lee, Doh C.,Schaller, Richard D.,Pietryga, Jeffrey M.,Crooker, Scott A.,L. Efros, Alexander,Klimov, Victor I. American Chemical Society 2015 Nano letters Vol.15 No.4
<P>We conduct spectroscopic and theoretical studies of photoluminescence (PL) from Ge quantum dots (QDs) fabricated via colloidal synthesis. The dynamics of late-time PL exhibit a pronounced dependence on temperature and applied magnetic field, which can be explained by radiative decay involving two closely spaced, slowly emitting exciton states. In 3.5 nm QDs, these states are separated by ∼1 meV and are characterized by ∼82 μs and ∼18 μs lifetimes. By using a four-band formalism, we calculate the fine structure of the indirect band-edge exciton arising from the electron–hole exchange interaction and the Coulomb interaction of the Γ-point hole with the anisotropic charge density of the <I>L</I>-point electron. The calculations suggest that the observed PL dynamics can be explained by phonon-assisted recombination of excitons thermally distributed between the lower-energy “dark” state with the momentum projection <I>J</I> = ± 2 and a higher energy “bright” state with <I>J</I> = ± 1. A fairly small difference between lifetimes of these states is due to their mixing induced by the exchange term unique to crystals with a highly symmetric cubic lattice such as Ge.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2015/nalefd.2015.15.issue-4/acs.nanolett.5b00344/production/images/medium/nl-2015-003445_0005.gif'></P>