Investigation of localized states in cadmium zinc telluride crystals by scanning photodielectric spectroscopy

Komar, V. K.; Migal, V. P.; Chugai, O. N.; Puzikov, V. M.; Nalivaiko, D. P.; Grebenyuk, N. N.
November 2002
Applied Physics Letters;11/25/2002, Vol. 81 Issue 22, p4195
Academic Journal
A method of scanning photodielectric spectroscopy of crystals has been suggested. It is based on the measurements of small increments of the real Δ∈′ and imaginary Δ∈″ parts of effective dielectric permittivity at a smooth variation of the photoexcitation wavelength λ. The spectral functions Δ∈′(λ) and Δ∈″(λ) are presented in a complex plane, that is, in parametric view, and their characteristic points are determined. Application of this method on Cd[SUB1-x]Zn[SUBx]Te crystals showed a possibility of determining the energy position of the localized states generated in the forbidden zone by the intrinsic structure defects.


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