Spin-exchange interaction in ZnO-based quantum wells. - Archive ouverte HAL Access content directly
Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2006

Spin-exchange interaction in ZnO-based quantum wells.

Abstract

Wurtzitic ZnO∕(Zn,Mg)O quantum wells grown along the (0001) direction permit unprecedented tunability of the short-range spin exchange interaction. In the context of large exciton binding energies and electron-hole exchange interaction in ZnO, this tunability results from the competition between quantum confinement and giant quantum confined Stark effect. By using time-resolved photoluminescence we identify, for well widths under 3nm, the redistribution of oscillator strengths between the A and B excitonic transitions, due to the enhancement of the exchange interaction. Conversely, for wider wells, the redistribution is canceled by the dominant effect of internal electric fields, which dramatically reduces the exchange energy.
Fichier principal
Vignette du fichier
PRB74-153302-Gil-2006-arxiv.pdf (160.21 Ko) Télécharger le fichier
Origin Files produced by the author(s)
Loading...

Dates and versions

hal-01304535 , version 1 (09-02-2019)

Identifiers

Cite

Bernard Gil, Pierre Lefebvre, Thierry Bretagnon, Thierry Guillet, J.A. Sans, et al.. Spin-exchange interaction in ZnO-based quantum wells.. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2006, 74 (15), pp.153302. ⟨10.1103/PhysRevB.74.153302⟩. ⟨hal-01304535⟩
46 View
38 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More