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Extended x-ray absorption fine structure study of arsenic in HgCdTe: -type doping linked to nonsubstitutional As incorporation in an unknown structure
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10.1063/1.3255989
/content/aip/journal/jap/106/10/10.1063/1.3255989
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/10/10.1063/1.3255989

Figures

Image of FIG. 1.
FIG. 1.

Arsenic SIMS profile for the XAS sample from surface to substrate. The level of arsenic is constant and about . The thickness has been determined by depth profiling the analysis crater.

Image of FIG. 2.
FIG. 2.

Effect of high-temperature annealing on the EXAFS signature of activated sample (thick) and nonactivated sample (thin): data (a) and modulus of for which the FT was conducted on the -range (b). data of sample B of previous publication (Ref. 19) has been added (dot) for comparison and offset for clarity’s sake.

Image of FIG. 3.
FIG. 3.

Comparison between activated sample data (thick) and adjustment (thin) in both (a) and -space (b). Both contributions in were fitted: EXAFS oscillations comparison is made in -space. The residual curve (dot) shows no contributions are missing. Fit quality is good.

Image of FIG. 4.
FIG. 4.

Comparison between nonactivated sample data (thick) and adjustment (thin) in both (a) and -space (b). Data adjustment corresponds to the case where the three distances AsAs, AsTe, and AsHg are fixed. Only the first contribution in was fitted: EXAFS oscillations comparison is made in Fourier backtransformed -space, not -space. The residual curve (dot) shows no contributions are missing. Fit quality is very good.

Image of FIG. 5.
FIG. 5.

Suggested 3D view for the compact structure. As (black) is at the center. The 8 Hg (drak gray) are around As at . Each AsHg link points toward construction cube summit. The 12 Te (light gray) at are positioned at the center of the 12 edges of the construction cube.

Tables

Generic image for table
Table I.

FTIR derived cadmium composition and thickness for the as-grown samples Hall 1 and Hall 2 together with the electrical characteristics and annealing conditions.

Generic image for table
Table II.

Results of data adjustment for the activated sample. The reduction factor was fixed at 0.8. represents the energy offset between experimental and first-principles calculated Fermi levels, the overall value of being perfectly reasonable for neutral As.

Generic image for table
Table III.

Results of data adjustment for the nonactivated sample. The reduction factor was fixed at 0.8. represents the energy offset between experimental and first-principles calculated Fermi levels, the overall value of between perfectly reasonable for neutral As.

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/content/aip/journal/jap/106/10/10.1063/1.3255989
2009-11-16
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Extended x-ray absorption fine structure study of arsenic in HgCdTe: p-type doping linked to nonsubstitutional As incorporation in an unknown AsHg8 structure
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/10/10.1063/1.3255989
10.1063/1.3255989
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