Exciton scattering by concentration fluctuations and projection of the spins of magnetic impurities in quantum wells in semimagnetic semiconductors

1997 ◽  
Vol 31 (5) ◽  
pp. 537
Author(s):  
A. V. Vertsimakha
Keyword(s):  
Quantum Wells ◽  
Concentration Fluctuations ◽  
Magnetic Impurities ◽  
Semimagnetic Semiconductors ◽  
Exciton Scattering

Indium concentration fluctuations in InGaN/GaN quantum wells

2019 ◽  
Vol 34 (8) ◽  
pp. 1718-1723 ◽  
Author(s):  
Paweł Piotr Michałowski ◽  
Ewa Grzanka ◽  
Szymon Grzanka ◽  
Artur Lachowski ◽  
Grzegorz Staszczak ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Quantum Wells ◽  
Secondary Ion Mass Spectrometry ◽  
Concentration Fluctuations ◽  
Specific Information ◽  
Indium Concentration ◽  
Ion Mass Spectrometry ◽  
Secondary Ion ◽  
Ingan Quantum Wells

Secondary ion mass spectrometry measurements can provide specific information on In fluctuations in InGaN quantum wells.

scholarly journals Подавление электронно-дырочного обменного взаимодействия в резервуаре неизлучающих экситонов

2019 ◽  
Vol 53 (9) ◽  
pp. 1195
Author(s):  
А.В. Трифонов ◽  
И.В. Игнатьев ◽  
К.В. Кавокин ◽  
А.В. Кавокин ◽  
П.Ю. Шапочкин ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Information Technologies ◽  
Electron Spin Polarization ◽  
Electron Hole ◽  
Long Time ◽  
Suppression Mechanism ◽  
Spin Flips ◽  
Exciton Scattering ◽  
Future Information

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.

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