Jahn-Teller interaction at Cr2+(d4) centres in tetrahedrally coordinated II-VI 
lattices studied by optical spectroscopy

Goetz, Gertrud; Zimmermann, H.; Schulz, Hans-Joachim

doi:10.1007/BF01316820

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Jahn-Teller interaction at Cr²⁺(d⁴) centres in tetrahedrally coordinated II-VI lattices studied by optical spectroscopy

MPS-Authors

/persons/resource/persons247576

Goetz, Gertrud
Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22089

Schulz, Hans-Joachim
Fritz Haber Institute, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Goetz, G., Zimmermann, H., & Schulz, H.-J. (1993). Jahn-Teller interaction at Cr²⁺(d⁴) centres in tetrahedrally coordinated II-VI lattices studied by optical spectroscopy. Zeitschrift für Physik B, 91(4), 429-436. doi:10.1007/BF01316820.

Cite as: https://hdl.handle.net/21.11116/0000-000A-0CF0-A

Abstract

Optical spectra of the d⁴ configuration have been studied with II-VI compounds. Failure of static crystal-field description led various authors to introduce static or dynamic Jahn-Teller models for the Cr²⁺ ground and excited states. With ZnS, the main optical transition ⁵E(D)↔⁵T₂(D) now appears as a doublet at 5218 and 5212cm^-1 coinciding for emission and absorption spectra. This no-phonon structure indicates a splitting of the gound- and excited-state multiplets under combined Jahn-Teller and spin-orbit interactions. In the cubic host ZnSe and in the hexagonal compounds CdS and CdSe, the optical properties exhibit the same general behaviour but with a decreasing shaping of the structural details. In addition to the NIR measurements, middle-infrared spectra have been recorded by Fourier spectroscopy in the transmission mode. For the first time a broad band could be detected for ZnS and interpreted as the ⁵Ê(T₂)←⁵B̂₂(T₂) absorption between the sheets of the respective adiabatic potential surfaces in D_2d symmetry. Its maximum near 1300 cm^-1 indicates v¯_JT≈430cm^-1 following the common interpretation of this transition.