1998
DOI: 10.1103/physrevb.58.1374
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Structural analysis of the semiconductor-semimetal alloyCd1xHgxTeby infrare

Abstract: Far-infrared reflectivity measurements have been made on traveling-heater-method-grown Cd 1Ϫx Hg x Te bulk single crystals. The spectra at 300, 77, and 25 K display two bands with fine structure, which cannot be explained by the usual two-oscillator model. These lattice spectra are shown to originate from four Cd-Te and Hg-Te vibrational modes in five basic Cd(4Ϫn)Hg(n)Te (nϭ0,1,2,3,4) cells consisting of cations tetrahedrally distributed around a shared Te anion. The mode frequencies are determined by the cat… Show more

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Cited by 38 publications
(40 citation statements)
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“…Thus only 6, 4, 4 intense + 2 weak phonon lines, respectively. More than 8 lines are observed when point defects occur (antisites, vacancies, …), responsible for the extra lines (as reported for HgCdTe [17]). Thus FIR admits the detection of defects: vacancies, intersites, antisites, H-loading deformations, quantifying amount of impurity ions [18].…”
Section: Discussionmentioning
confidence: 96%
“…Thus only 6, 4, 4 intense + 2 weak phonon lines, respectively. More than 8 lines are observed when point defects occur (antisites, vacancies, …), responsible for the extra lines (as reported for HgCdTe [17]). Thus FIR admits the detection of defects: vacancies, intersites, antisites, H-loading deformations, quantifying amount of impurity ions [18].…”
Section: Discussionmentioning
confidence: 96%
“…An additional mode caused by introducing of the hydrogen atoms in the tetrahedra in the crystal lattice of CdTe was observed in the FIR-spectra obtained using synchrotron radiation as the source [11]. The problem of the additional phonon modes (APM) in the 100-115 cm −1 range has existed for the Hg 1− x Cd x Te alloys for the last forty years [13][14][15][16][17][18][19][20][21][22]. The additional mode is observed too in HgTe crystals in this same range [23,24].…”
Section: Introductionmentioning
confidence: 99%
“…The most comprehensive experimental investigation of the Hg 1− x Cd x Te phonon spectra was undertaken by Kozyrev et al [17], where the composition dependence of the subtle structure of two sub-bands HgTe-like and CdTe-like were observed and analysed in detail and an interpretation in terms of five based cells (tetrahedra) was presented. Nevertheless, the region below 118 cm −1 was excluded from consideration in [17].…”
Section: Introductionmentioning
confidence: 99%
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“…The line shape asymmetry of Hg 1-x Cd x Te -phonon spectra was observed also. In the paper by S. Kozyrev et al [3], the range 100 cm -1 -115cm -1 is excluded from consideration. Since the 70th, the range of 30 cm -1 -115 cm -1 was discussed in the literature [4][5][6][7].…”
mentioning
confidence: 99%