Doping and optimal electron spin polarization in n-ZnMnSe for quantum-dot spin-injection light-emitting diodes

Autor:	Heinz Kalt, N. Höpcke, Michael Hetterich, Wolfgang Löffler, M. Grün, S. Li
Rok vydání:	2010
Předmět:	Physics Electron density Zeeman effect Physics and Astronomy (miscellaneous) Spin states Condensed matter physics Spin polarization Magnetic semiconductor Zero field splitting Condensed Matter::Mesoscopic Systems and Quantum Hall Effect symbols.namesake Quantum dot symbols Spinplasmonics
Zdroj:	Applied Physics Letters. 96:052113
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.3308500
Popis:	Utilizing the diluted magnetic semiconductor ZnMnSe for electron spin alignment near-perfect spin state preparation in semiconductor quantum dots has been demonstrated. We show that the electron spin polarization depends strongly on the electron concentration in ZnMnSe:Cl. Using a model which takes accurately the Zeeman sublevel occupation into account, we can explain well the experimentally observed results. We find that the electron concentration must be below the effective density of states to obtain full electron spin polarization and best device operation. This is especially important in II-VI spin-aligner materials with a low density of states.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5b7be2108b46c6eddf97f4ac62f90c66 https://doi.org/10.1063/1.3308500 Zobrazit plný text záznamu