High resolution Brillouin spectroscopy of the surface acoustic waves in SbTe van der Waals single crystals.

High-resolution Brillouin spectroscopy was employed to investigate the anisotropy in surface wave velocities within a bulk single crystal of SbTe, a well-known layered van der Waals material. By leveraging the bulk elastic constants derived from various simulation methods, we were able to theoretically calculate the distribution of surface acoustic phonon velocities on the cleavage plane of the material. Upon analyzing multiple simulation results, it became evident that the most significant discrepancies arose in the calculations of the elastic constant c, with values ranging from 48 to 98 GPa.

Investigations of proximity-induced superconductivity in the topological insulator BiTe by microRaman spectroscopy.

We used the topological insulator (TI) BiTeand a high-temperature superconductor (HTSC) hybrid device for investigations of proximity-induced superconductivity (PS) in the TI. Application of the superconductor YBaCuO (YBCO) enabled us to access higher temperature and energy scales for this phenomenon. The HTSC in the hybrid device exhibits emergence of a pseudogap state for T > T that converts into a superconducting state with a reduced gap for T < T.

[Selected personality dimensions and occupational burnout in the group of professional and volunteer firefighters].

Background: The purpose of this research was to examine the relationships between selected personality dimensions and occupational burnout among professional and volunteer firefighters. Difficult conditions are the cause of loss of not only health but also life. Such working conditions may cause occupational burnout consisting of employee's exhaustion.

Dispersion of the surface phonons in semiconductor/topological insulator Si/BiTe heterostructure studied by high resolution Brillouin spectroscopy.

The dynamics and dispersion of surface phonons in heterostructure semiconductor/ topological insulator Si/BiTe was investigated using high resolution Brillouin light scattering method in the GHz frequency range. Both Rayleigh and Sezawa surface acoustic waves have been observed for wave vectors ranging from 0.006 to 0.

Surface phonons in topological insulator BiTe investigated by Brillouin light scattering.

High resolution Brillouin spectroscopy was used for the first time to study the dispersion and anisotropy of surface phonons in the single crystal of topological insulator BiTe. Two surface acoustic waves have been observed, which distinguishes this material from other metals or nontransparent materials. The modes were assigned as Rayleigh waves.