Bond lengths in Cd1−Zn Te beyond linear laws revisited

Koteski, V.; Haas, H.; Holub-Krappe, E.; Ivanović, N.; Mahnke, H.‐E.

doi:10.1016/j.jallcom.2003.05.009

Cited by 17 publications

(14 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The small bond length of As to the neighboring Cd, in other words, the strong inward relaxation, is even larger than in the case of replacing a Cd atom by an isovalent Zn atom [13]. This may be taken as a plausible reason for the high tendency of As to form clusters at high As concentrations, thereby limiting p-type doping with As.…”

Section: Resultsmentioning

confidence: 99%

Lattice distortion around impurity atoms as dopants in CdTe

et al. 2005

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Lattice distortion around impurity atoms as dopants in CdTe

et al. 2005

View full text Add to dashboard Cite

“…3. For comparison the data extracted from the K-edge study on Cd by V. Koteski [43] as well as from X-ray diffraction in accordance with the virtual crystal approximation (VCA model, Vegard's law) are given [44](Solid line in Figure 3). The results imply that the local atomic structure is distorted and Fig.…”

Section: Extended X-ray Absorption Fine Structure (Exafs)mentioning

confidence: 99%

Synchrotron radiation x-ray absorption fine-structure and Raman studies on CdZnTe ternary alloys

Chen

Feng

et al. 2009

SPIE Proceedings

View full text Add to dashboard Cite

The synchrotron radiation (SR) X-ray absorption fine-structure spectroscopy (XAFS) technology has been employed to obtained Zn K-edge absorption spectra for Cd 1−x Zn x Te alloy with x = 0.03, 0.10, 0.20, 0.30, 0.40, 0.50 and 1.00. Their Fourier transform spectra were analyzed, which have shown a bimodal distribution of bond lengths, suggesting distortion of the Te sub-lattice, so that the linear interpolation is true only in an approximate sense. Synthetic CdZnTe crystals can be used for the room temperature-based detection of gamma radiation. The radiation detection properties of CZT crystals vary widely. A common defect found in most high-quality CZT crystals is Te secondary phases, often located along grain boundaries. The secondary phases can be both large inclusions (>50 μm) and smaller precipitates (<50 μm). The Te secondary phases distributed throughout the crystal can cause changes to the detector leakage current, resulting in decreased radiation spectrometer performance. This set of Cd 1-x Zn x Te crystals were also measured by Raman scattering at room temperature. The two observed peaks at about 125 and 145 cm -1 which can be assigned to Te A 1 and E phonon mode, respectively. The induced damage on the crystal surfaces by Raman laser has been discussed. It is suggested that in the case of highly Zn doping CdZnTe crystals, the ZnTe bond were broken by laser exposing and then free Te atoms are migrating to these heated areas which cause Te precipitate. Further, the results of the soft X-ray measurements have been also presented and this part of the experimental data needs to do more penetrating analysis in the future.

show abstract

“…Evolution of the bond length with changing composition is more pronounced in the mixed crystals containing Zn. This effect was observed and discussed in several systems like Zn 1−x Hg x Te [48], Zn 1−x Mn x Se [49], Zn 1−x Mn x Te [50,51], and Cd 1−x Zn x Te mixed crystals [44,[52][53][54][55]. At least the recent experimental data for Cd 1−x Zn x Te clearly suggest also a non-linear variation of the bond lengths with the mixed crystal composition [55].…”

Section: The Effect Of the Mixed Crystal Compositionmentioning

confidence: 88%