Spin susceptibility enhancement in a two-dimensional hole gas

Hervé Boukari (1) , Florent Perez (2) , David Ferrand , Piotr Kossacki (1, 3) , Bernard Jusserand (2) , Joel Cibert (4)

1 LSP - Laboratoire de Spectrométrie Physique
2 INSP - Institut des Nanosciences de Paris
3 IFD - Institute of Experimental Physics [Warsaw]
4 LLN - Laboratoire Louis Néel

The critical spin splitting needed to fully polarize a two-dimensional heavy-hole gas in a (Cd,Mn)Te quantum well thanks to the giant Zeeman effect is measured through photoluminescence and transmission spectroscopy. While the splitting between two circularly polarized photoluminescence remains equal to the bare spin splitting, the critical spin splitting which governs the polarization is enhanced, in good agreement with the prediction of a model of hole-hole interactions previously applied to conduction electrons. Consequences for carrier induced ferromagnetism are discussed.

Mots clés: two-dimensional electron gas; two-dimensional hole gas; quantum well; electron-electron interaction; carrier induced ferromagnetism; diluted magnetic semiconductors

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]; Electrons fortement corrélés [cond-mat.str-el]

Hervé Boukari, Florent Perez, David Ferrand, Piotr Kossacki, Bernard Jusserand, et al.. Spin susceptibility enhancement in a two-dimensional hole gas. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2006, 73, pp.115320. ⟨10.1103/PhysRevB.73.115320⟩. ⟨hal-00021919⟩