Evolution of lattice, spin, and charge properties across the phase diagram of FeSe$_{1-x}$S$_x$

N. Lazarevic; A. Baum; A. Milosavljevic; L. Peis; R. Stumberger; J. Bekaert; A. Solajic; J. Pesic; Aifeng Wang; M. Scepanovic; M. V. Milosevic; C. Petrovic; Z. V. Popovic; R. Hackl

doi:10.1103/PhysRevB.106.094510

paper

Evolution of lattice, spin, and charge properties across the phase diagram of FeSe $_{1 - x}$ S $_{x}$

arXiv:2202.02227 · doi:10.1103/PhysRevB.106.094510

Abstract

A Raman scattering study covering the entire substitution range of the FeSe $_{1 - x}$ S $_{x}$ solid solution is presented. Data were taken as a function of sulfur concentration $x$ for $0 \leq x \leq 1$ , of temperature and of scattering symmetry. All type of excitations including phonons, spins and charges are analyzed in detail. It is observed that the energy and width of iron-related B $_{1 g}$ phonon mode vary continuously across the entire range of sulfur substitution. The A $_{1 g}$ 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 $_{1 g}$ symmetry vary discontinuously. The magnetic excitation centered at approximately 500 cm $^{- 1}$ disappears above $x = 0.23$ where the A $_{1 g}$ lattice excitations exhibit a discontinuous change in energy. The low-energy mode associated with fluctuations displays maximal intensity at the nemato-structural transition and thus tracks the phase boundary.

Evolution of lattice, spin, and charge properties across the phase diagram of FeSe $_{1 - x}$ S $_{x}$

Abstract

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Evolution of lattice, spin, and charge properties across the phase diagram of FeSe1−x​Sx​

Abstract

References in corpus (36)

Cited by in corpus (2)

Evolution of lattice, spin, and charge properties across the phase diagram of FeSe $_{1 - x}$ S $_{x}$