Sub-second electron spin lifetimes in quantum dots at zero applied magnetic field due to alignment of QD nuclei

R. Oulton, S. Yu. Verbin, T. Auer, R. V. Cherbunin, A. Greilich, D. R. Yakovlev, M. Bayer, D. Reuter, A. Wieck

Research output: Contribution to journalArticle (Academic Journal)

13 Citations (Scopus)

Abstract

A key to ultra-long electron spin memory in quantum dots (QDs) at zero magnetic field is polarization of the nuclei, such that the electron spin is stabilized along the nuclear magnetic field. We demonstrate that spin-polarized electrons in n-doped QDs align the nuclear field via hyperfine interaction. A feedback onto the electrons occurs, leading to stabilization of polarization, for which spin memory is retained over 0.2 seconds. (C) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original languageEnglish
Pages (from-to)3922-3927
Number of pages6
Journalphysica status solidi (b)
Volume243
Issue number15
DOIs
Publication statusPublished - Dec 2006

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