Hole states in wide band-gap diluted magnetic semiconductors and oxides

Abstract

Puzzling disagreement between photoemission and optical findings in magnetically doped GaN and ZnO is explained within a generalized alloy theory. The obtained results show that the strong coupling between valence-band holes and localized spins gives rise to a mid-gap Zhang-Rice-like state, to a sign reversal of the apparent p-d exchange integral, and to an increase of the band-gap with the magnetic ion concentration.

5 pages, 3 figures

References in corpus (8)

• Theory of ferromagnetic (III,Mn)V semiconductors
• Magnetic interactions in transition metal doped ZnO : An abinitio study
• On the character of states near the Fermi level in (Ga,Mn)As: impurity to valence band crossover
• Paramagnetic GaN:Fe and ferromagnetic (Ga,Fe)N - relation between structural, electronic, and magnetic properties
• Effect of the s,p-d exchange interaction on the excitons in (Zn,Co)O epilayers
• Observation of strong-coupling effects in a diluted magnetic semiconductor (Ga,Fe)N
• Excitonic giant Zeeman effect in GaN:Mn^3+
• The Crossover from Impurity to Valence Band in Diluted Magnetic Semiconductors: The Role of the Coulomb Attraction by Acceptor

Cited by in corpus (10)

• Controlled aggregation of magnetic ions in a semiconductor. Experimental demonstration
• Theory of the $sp-d$ coupling of transition metal impurities with free carriers in ZnO
• Theory of spin waves in ferromagnetic (Ga,Mn)As
• Interplay between localization and magnetism in (Ga,Mn)As and (In,Mn)As
• Fermi level and bands offsets determination in insulating (Ga,Mn)N/GaN structures
• Momentum-resolved spin splitting in Mn-doped trivial CdTe and topological HgTe semiconductors
• Effects related to deposition temperature of ZnCoO films grown by Atomic Layer Deposition - uniformity of Co distribution, structural, optical, electrical and magnetic properties
• Puzzling magneto-optical properties of ZnMnO films
• Tight-binding theory of spin-spin interactions, Curie temperatures, and quantum Hall effects in topological (Hg,Cr)Te in comparison to non-topological (Zn,Cr)Te, and (Ga,Mn)N
• From narrow-gap and semimagnetic semiconductors to spintronics and topological matter: a life with spins