Two-electron states bound to interface defects in quantum cascade lasers subjected to a strong magnetic field

R. Ferreira (1) , Gérald Bastard (1) , C. Sirtori (2, 3) , G. Strasser (4) , K. Unterrainer (4)

1 LPA - Laboratoire Pierre Aigrain
2 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
3 Thales Research and Technology [Palaiseau]
4 IPF - Institut fur Photonik und Festkoerperelectronik

The binding of two electrons in interface defects of quantum cascade laser structures is investigated when a strong magnetic field is applied parallel to the growth axis of the structure. We show that this binding is rarely energetically possible. However, we also show that once two electrons are sufficiently far away, they remain in a quasistable state despite the emission of acoustical phonons.

Domaines: Autre [cond-mat.other]

R. Ferreira, Gérald Bastard, C. Sirtori, G. Strasser, K. Unterrainer. Two-electron states bound to interface defects in quantum cascade lasers subjected to a strong magnetic field. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2007, 76, pp.165322. ⟨hal-00275526⟩