Media type: E-Article Title: Quantum dot spin pure‐dephasing due to bulk magnons at low temperatures Contributor: Jacak, Witold; Krasnyj, Jurij; Jacak, Lucjan Published: Wiley, 2009 Published in: physica status solidi c, 6 (2009) 4, Seite 841-844 Language: English DOI: 10.1002/pssc.200880638 ISSN: 1862-6351; 1610-1642 Keywords: Condensed Matter Physics Origination: Footnote: Description: AbstractWe demonstrate disappearance at 0 T = 0, and strong reduction at low temperatures, of pure‐dephasing of exciton spin located in a quantum dot (QD) embedded in a magnetic medium, e.g. in a diluted magnetic semiconductor. The off‐diagonal spin decoherence results due to hybridization of local QD exciton spin with magnons from surrounding crystal–we estimate the corresponding time‐scale and formulate a general rule for the scaling of dephasing time versus QD diameter derived within the Green function approach (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)