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“Evolution of lattice, spin, and charge properties across the phase diagram of Fe1-xSx”. Lazarevic N, Baum A, Milosavljevic A, Peis L, Stumberger R, Bekaert J, Solajic A, Pesic J, Wang A, Scepanovic M, Abeykoon AMM, Milošević, MV, Petrovic C, Popovic ZV, Hackl R, Physical review B 106, 094510 (2022). http://doi.org/10.1103/PHYSREVB.106.094510
Abstract: A Raman scattering study covering the entire substitution range of the FeSe1-xSx solid solution is presented. Data were taken as a function of sulfur concentration x for 0 <= x <= 1, of temperature and of scattering symmetry. All types of excitations including phonons, spins, and charges are analyzed in detail. It is observed that the energy and width of the iron-related B-1g phonon mode vary continuously across the entire range of sulfur substitution. The A(1g) chalcogenide mode disappears above x = 0.23 and reappears at a much higher energy for x = 0.69. In a similar way the spectral features appearing at finite doping in A(1g) symmetry vary discontinuously. The magnetic excitation centered at approximately 500 cm(-1) disappears above x = 0.23 where the A(1g) lattice excitations exhibit a discontinuous change in energy. The low-energy mode associated with fluctuations displays maximal intensity at the nematostructural transition and thus tracks the phase boundary.
Keywords: A1 Journal article; Condensed Matter Theory (CMT)
Impact Factor: 3.7
DOI: 10.1103/PHYSREVB.106.094510
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