2007/04/30 by Daniele Fausti, Tom T. A. Lummen, Cosmina Angelescu +16 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemistry #Condensed matter physics #Crystallography #Energy (signal processing) #Geometry #Homogeneous space #Inelastic neutron scattering #Inelastic scattering #Materials science #Order (exchange) #Organic and Molecular Conductors Research #Phase (matter) #Phase transition #Physics #Quantum mechanics #Raman spectroscopy #Scattering #Solid-state spectroscopy and crystallography #Spin (aerodynamics) #Symmetry (geometry) #Thermodynamics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.75.245114
published as Phys. Rev. B 75, 245114 (2007)
openalex publication_date 2007/06/18 · arxiv created 2007/10/30 · arxiv updated 2009/12/01 · openalex created_date 2016/07/22 · openalex updated_date 2026/08/05
The sequence of phase transitions and the symmetry of, in particular, the low temperature incommensurate and spin-Peierls phases of the quasi-one-dimensional inorganic spin-Peierls system TiOX (X=Br and Cl) have been studied using inelastic light scattering experiments. The anomalous first-order character of the transition to the spin-Peierls phase is found to be a consequence of the different symmetries of the incommensurate and spin-Peierls (P21∕m) phases. The pressure dependence of the lowest transition temperature strongly suggests that magnetic interchain interactions play an important role in the formation of the spin-Peierls and the incommensurate phases. Finally, a comparison of Raman data on VOCl to the TiOX spectra shows that the high energy scattering previously observed has a phononic origin.