Incommensurate interactions and non-conventional spin-Peierls transition in TiOBr
arXiv:cond-mat/0504445 · doi:10.1103/PhysRevB.72.020105
Abstract
Temperature-dependent x-ray diffraction of the low-dimensional spin 1/2 quantum magnet TiOBr shows that the phase transition at T_{c2} = 47.1 (4) K corresponds to the development of an incommensurate superstructure. Below T_{c1} = 26.8 \pm 0.3 K the incommensurate modulation locks in into a two-fold superstructure similar to the low-temperature spin-Peierls state of TiOCl. Frustration between intra- and interchain interations within the spin-Peierls scenario, and competition between two-dimensional magnetic order and one-dimensional spin-Peierls order are discussed as possible sources of the incommensurability.
5 pages including 3 figures and 1 table
References in corpus (9)
- S=1/2 chains and spin-Peierls transition in TiOCl
- Spin-Peierls transition in TiOCl
- Orbital order in the low-dimensional quantum spin system TiOCl probed by ESR
- TiOCl, an orbital-ordered system?
- Infrared optical properties of the spin-1/2 quantum magnet
- Giant phonon anomalies in the pseudo-gap phase of TiOCl
- Spin gap formation in the quantum spin systems TiOX, X=Cl and Br
- Ab-initio Phonon Calculations for the layered compound TiOCl
- Analysis of the phonon spectrum in the titanium oxyhalide TiOBr
Cited by in corpus (16)
- Zero-field incommensurate spin-Peierls phase with interchain frustration in TiOCl
- Rearrangement of Van-der-Waals Stacking and Formation of a Singlet State at K in a Cluster Magnet
- Two pressure-induced transitions in TiOCl: Mott insulator to anisotropic metal
- Pressure-induced insulator-to-metal transition in low-dimensional TiOCl
- X-ray Scattering Study of the spin-Peierls transition and soft phonon behavior in TiOCl
- Spin dynamics in the low-dimensional magnet TiOCl
- Symmetry disquisition on the TiOX phase diagram
- Mott-Hubbard gap closure and structural phase transition in the oxyhalides TiOBr and TiOCl under pressure
- One-dimensional versus two-dimensional correlation effects in the oxyhalides TiOCl and TiOBr
- Pressure-induced metallization and structural phase transition of the Mott-Hubbard insulator TiOBr
- Cluster Dynamical Mean-field calculations for TiOCl
- Anisotropic Triangular Lattice Realized in Rhenium Oxychlorides A3ReO5Cl2 (A = Ba and Sr)
- Singlet-Triplet Excitations in the Unconventional Spin-Peierls System TiOBr
- Critical properties of the unconventional spin-Peierls system TiOBr
- Heat conductivity of the spin-Peierls compounds TiOCl and TiOBr
- Incommensurate spin Luttinger liquid phase in a model for the spin-Peierls materials TiOBr and TiOCl