Temat: spin-orbit coupling - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect of Rashba Spin-Orbit Coupling on the Spin Polarization of Holes in Two-Dimensional GaMnAs Magnetic Semiconductors
Autorzy:: Stagraczyński, S.
Dugaev, V.
Berakdar, J.
Powiązania:: https://bibliotekanauki.pl/articles/1032428.pdf
Data publikacji:: 2017-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: Magnetization
Rashba spin-orbit coupling
Opis:: We consider the effect of the Rashba spin-orbital coupling in two-dimensional GaAs semiconductor heavily doped with Mn, on the spin polarization of holes. Due to the strong internal spin-orbit interaction in GaAs, the spin of a hole is not a good quantum number but the hole in some energy state has a certain mean value of spin, which can be strongly affected by the Rashba spin-orbital interaction related to the substrate for 2D material.
Źródło:: Acta Physica Polonica A; 2017, 132, 1; 189-192
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Nowoczesne spojrzenie na konfiguracje elektronowe i układ okresowy pierwiastków, czyli o efektach relatywistycznych w chemii
A modern look at electron configurations and the periodic table of elements, or relativistic effects in chemistry
Autorzy:: Orlik, Marek
Powiązania:: https://bibliotekanauki.pl/articles/27310033.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: prawo okresowości
prawo Moseleya
konfiguracje elektronowe
sprzężenia spin-orbita
efekt relatywistyczny
układ okresowy pierwiastków
periodicity law
Moseley’s law
electronic configuration
spin-orbit coupling
relativistic effects
periodic table of the elements
Opis:: The article describes in an accessible, conceptual way various types of relativistic effects, which are an important part of modern chemical education, practically absent in textbooks, however allowing for a better understanding of the properties of chemical elements and their compounds. This description was preceded by a concise non-relativistic characterization of electrons in multi-electron atoms, in terms of radial probability densities, in order to explain the dependence of electron energies on the principal (n) and orbital (l) quantum numbers. The results of recent quantum chemical calculations are discussed, which show the improved energy sequence of ns and (n-1)d orbitals in transition elements and explain the electron configurations of both neutral atoms and cations of the 3d and 4d block elements. The description of the relativistic effects begins with early Dirac concept of spin-orbit coupling as causing the splitting of the degenerate p, d and f orbitals for two sets of spinors. The role of this splitting in the stability of the respective oxidation states of the cations is discussed. Another important type of relativistic effects, confirmed only in the 1970s, operates in atoms of high nuclear charge (starting from 6. period) in which electrons move at a speed close to the speed of light. The resulting relativistic increase in the mass of the moving electron causes the stabilization of s and p orbitals, and destabilization of d and f orbitals. Representative examples of the influence of all relativistic effects on the properties of elements and their compounds are given (including mercury liquidity or the color of gold). In particular, relativistic effects specific for blocks 5d, 6p, 4f, 5f, 6d, and 7p were discussed. The possibilities of predicting further expansion of the periodic table with elements up to the atomic number of about 170 are outlined, based on taking into account both the relativistic effects for electrons and the stability of superheavy atomic nuclei. The article is addressed to chemists of all branches of this discipline.
Źródło:: Wiadomości Chemiczne; 2023, 77, 9-10; 833--871
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

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