Abstract
Electronic Raman scattering has been studied in single crystals of 5d transition metal osmium under pressures up to 60 GPa in the temperature range of 10-300K. With the use of green and blue excitation wavelengths we observe an appearance of well—defined electronic peaks at ∼ 580 cm-1 for wave vector direction q ∥ [0001]] and at ∼ 350 cm-1 for q∥ [100] in the pressure range of 20-30 GPa. It was shown in our combined experimental and theoretical investigation that a consideration of both a renormalization of the electron self-energies near the Fermi level and a change in the Fermi surface under pressure and temperature variation is needed to describe the observed spectra.
Export citation and abstract BibTeX RIS