6533b829fe1ef96bd12896e8

RESEARCH PRODUCT

Optical absorption of zinc selenide doped with cobalt (Zn1−xCoxSe) under hydrostatic pressure

Alfredo SeguraCh. Ferrer-rocaV. Muñoz

subject

chemistry.chemical_compoundRange (particle radiation)chemistryAbsorption edgeDopingHydrostatic pressureAnalytical chemistrychemistry.chemical_elementZinc selenideMagnetic semiconductorCondensed Matter PhysicsAbsorption (electromagnetic radiation)Cobalt

description

Abstract The optical absorption of the diluted magnetic semiconductor Zn1−xCOxSe (x = 0.02) has been measured at room temperature under hydrostatic pressure up to 14GPa in a membrane diamond-anvil cell. We found two absorption features: (i) an absorption structure in the energy range 1.6−1.8eV, with a negligible pressure shift (i.e., 0.45 ± 0.05 meV/GPa) which we have identified as the Co2+(3d7) internal transition 4A2(F)→+4T1(P) and (ii) an onset in the energy range 2−2.7eV which redshifts with pressure (−8.1±0.6meV/GPa). We have attributed such absorption edge to charge transfer between the ZnSe valence band and the Co2+(3d7) levels.

yearjournalcountryeditionlanguage
2000-09-01High Pressure Research
https://doi.org/10.1080/08957950008200953