Abstract
The discovery of superconductivity in FeSe led to a new subclass of high-temperature superconductors ? iron chalcogenides. Materials from this group exhibit variety of specific features, from superconductivity with relatively high critical temperatures to low-dimensional magnetic properties. This review presents the most important results regarding the iron chalcogenides, with special emphasis on their vibrational properties investigated by means of Raman spectroscopy. Temperature- and/or doping-dependent Raman scattering spectra of iron chalcogenides provide a valuable insight into the complex relationships between the vibrational, electronic and magnetic properties of these materials. The results presented in this review demonstrated that Raman spectroscopy provides new insights which may significantly improve our understanding of the fundamental properties of iron chalcogenides.
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