Evidence of a sulfur-boron-hydrogen complex in GaAs grown by the liquid encapsulation Czochralski technique

Abstract

In LEC-grown GaAs:S, two vibrational absorption lines are measured at 2382.2 and 2392.8 cm −1 ͑T =7 K͒ and assigned to 11 B-H and 10 B-H stretching modes. Uniaxial stress experiments reveal that the symmetry of the responsible complex is C s. Bond strength considerations suggest that this complex is a S As-B Ga pair passivated by hydrogen bonded to boron. The constituents of this S-B-H complex are located within a {110} plane.

Hydrogen-impurity complexes in III–V semiconductors

“…An intense vibrational absorption line was measured in LEC-grown GaAs at 3300.0 cm −1 , which is accompanied by a very weak satellite line at 3289.5 cm −1 as shown in figure 27. The intensity ratio of these lines amounts to about 0.003, a value close to the ratio of the natural ≈ 70˚is derived from the intensity ratios of the polarized split components of the 2383.2 cm −1 line under uniaxial stress (from [145]). abundances of the oxygen isotopes 18 O and 16 O.…”

“…Their integrated intensities are correlated with a ratio of 4. Therefore, the two lines were assigned to the stretching modes of hydrogen directly bonded to the isotopes 11 B Ga and 10 B Ga [145]. The 10 B → 11 B isotope shift of 9.6 cm −1 is close to the calculated value of 9.9 cm −1 for a 'free' B-H molecule.…”

“…This can be explained by the considerably larger bond strength in molecules for B-H compared with Ga-H. Allowing the relaxation of the S As and As atoms surrounding B Ga , the model for the S-B-H complex depicted in figure 26 has been proposed [145], with the three atoms located in a {110} plane. The fit of the temperature dependences of ω and with equations ( 2) and ( 3) measured on the 11 B-H and 10 B-H stretching modes delivered two sets of parameters for ω 0 , δω and η (see table 4).…”

Interplay between interstitial and substitutional hydrogen donors in ZnO

“…We apply therefore the model proposed by Persson and Ryberg which was later modified for the zeroenergy contribution [41]. The model takes into account an interaction between a LVM anharmonically coupled to a single exchange mode E 0 through a parameter δσ .…”

Infrared absorption on hydrogen in anatase TiO2

“…The temperature shift and broadening of a vibrational mode is typically explained by a dephasing of the LVM due to an anharmonic interaction with the lattice vibrations. Here we apply the model by Persson and Ryberg [22] modified later by Ulrichi and Clerjaud to account for the zero-point contribution [23]. In this model the position and the FWHM (DG) of the LVM are expressed by…”