Structural properties of Sb2S3 under pressure: evidence of an electronic topological transition

Abstract

High-pressure Raman spectroscopy and x-ray diffraction of Sb2S3 up to 53 GPa reveals two phase transitions at 5 GPa and 15 GPa. The first transition is evidenced by noticeable compressibility changes in distinct Raman-active modes, in the lattice parameter axial ratios, the unit cell volume, as well as in specific interatomic bond lengths and bond angles. By taking into account relevant results from the literature, we assign these effects to a second-order isostructural transition arising from an electronic topological transition in Sb2S3 near 5 GPa. Close comparison between Sb2S3 and Sb2Se3 up to 10 GPa reveals a slightly diverse structural behavior for these two compounds after the isostructural transition pressure. This structural diversity appears to account for the different pressure-induced electronic behavior of Sb2S3 and Sb2Se3 up to 10 GPa, i.e. the absence of an insulator-metal transition in Sb2S3 up to that pressure. Finally, the second high-pressure modification appearing above 15 GPa appears to trigger a structural disorder at ~20 GPa; full decompression from 53 GPa leads to the recovery of an amorphous state.

Experimental Observation of the High Pressure Induced Substitutional Solid Solution and Phase Transformation in Sb2S3

“…3 . These findings are considerably different from two recent high-pressure studies on Sb 2 S 3 7 , 8 . A joint experimental and theoretical study of Sb 2 S 3 under compression indicates that neither a first-order phase transition nor any second order isostructural phase transition has been observed up to 25 GPa 7 .…”

“…Further compression leads to structural disorder and amorphization. However, in the case of Sb 2 S 3 , contradictions exist in the reported results in the literature, which needs to be testified by further experimental and theoretical studies 7 , 8 . Nevertheless, to the best of our knowledge, the pressure-induced substitutional solid solution phase is unprecedented in the sulfide family of these group VA elements.…”

Enhanced zeta potential of polyol method synthesized PVP-capped Sb2S3 nanoparticles

“…Fig. 2 (b) shows the lorentzian fitting of Raman spectra for pure sample.Raman spectra depicted by the six peaksviz, one strong peak at 280.4 cm -1 , three moderatepeaks at 189.8, 237.7 and 306.6 cm -1 and two weak peaks at 113.1 and 156.7 cm -1 confirm the formation of stibnite phase of Sb 2 S 3 in both the samples in line with those reported earlier [4,5]. Fig.…”

Copper antimony sulfide thin films for visible to near infrared photodetector applications

“…correspond to the Sb 2 S 3 phase. 40,41 Raman peak values obtained for the samples are in good agreement with the reported Raman active vibrations of CAS and Sb 2 S 3 . Raman intensity of the CAS peak at 333 cm À1 is increased signicantly as Cu thickness raised from 20 to 40 nm which is in good agreement with the XRD results.…”