CsYbSe₂

Abstract

Caesium ytterbium diselenide, CsYbSe2, crystallizes in space group P63/mmc of the hexagonal system. It is isostructural with CsPrS2, which has the β‐RbScO2 structure type. In the asymmetric unit, the site symmetries of atoms Cs, Yb and Se are m2, m and 3m, respectively. The structure comprises layers of edge‐shared YbSe6 octahedra perpendicular to [001], with Cs atoms between the layers in a trigonal‐prismatic arrangement.

Crystal Synthesis and Frustrated Magnetism in Triangular Lattice CsRESe2 (RE = La–Lu): Quantum Spin Liquid Candidates CsCeSe2 and CsYbSe2

“…So far, only the structure of CsYbSe 2 was reported, which was synthesized via complex multiple steps. 43 In this work, we employed a new and simple flux method to grow large single crystals of 112-class compounds, enabling anisotropic physical property measurements and inelastic neutron scattering experiments. In addition, for the first time, we confirmed that new compounds in this CsRESe 2 series crystallize in either trigonal or hexagonal crystal systems, depending upon the size of the RE 3+ ion.…”

“…These can be well-exemplified by the Cs RE Se 2 family. So far, only the structure of CsYbSe 2 was reported, which was synthesized via complex multiple steps . In this work, we employed a new and simple flux method to grow large single crystals of 112-class compounds, enabling anisotropic physical property measurements and inelastic neutron scattering experiments.…”

Phonon Chirality Induced by Vibronic-Orbital Coupling

“…The rapid change in the E 2g Raman mode energy at 90 K and the associated overlap of this mode with the CEF1 mode from 100 to 200 K is noteworthy. In CsYbSe 2 , there is some evidence for anisotropic negative thermal expansion in these temperature ranges 33,55 . In general, a nearly discontinuous change with temperature of any spectral parameter (such as the energy of the E 2g mode) is suggestive of a phase transition, though we find no direct evidence of any phase transition here.…”