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dc.contributor.advisorKoch, Henrik
dc.contributor.advisorDanon, Jeroen
dc.contributor.authorQvist, Jørgen Holme
dc.date.accessioned2018-09-13T07:17:01Z
dc.date.available2018-09-13T07:17:01Z
dc.date.created2018-06-11
dc.date.issued2018
dc.identifierntnudaim:18767
dc.identifier.urihttp://hdl.handle.net/11250/2562296
dc.description.abstractWe study the effect of hyperfine interaction in the persistent spin helix (PSH) by investigating the nuclear spin pumping caused by non-equilibrium electron spin dynamics. In the first two chapters we rederive, based on already published literature, the PSH diffusion equation and a formalism for calculating the nuclear spin pumping from non-equilibrium electron spin dynamics. To get some useful insight into the procedure we use, and to show that it actually works, we calculate the nuclear spin pumping in a proof of principle setup in chapter 4. The nuclear spin pumping, and its effects, in the PSH is studied in chapter 5. We find that the lowest-order effect of the nuclear spin polarization stabilizes the electron spin structure. Some higher-order contributions introduce higher-order harmonics, which also rotate the spin structure out of the plane of the helix. The stabilizing effect is considerable when 100 % of the nuclei are polarized. However, for a more realistic nuclear spin polarization, the effect is small.
dc.languageeng
dc.publisherNTNU
dc.subjectIndustriell kjemi og bioteknologi, Kjemi
dc.titleThe persistent spin helix in the presence of hyperfine interactions
dc.typeMaster thesis


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