Zero-field incommensurate spin-Peierls phase with interchain frustration in TiOCl

Abstract

We report on the magnetic, thermodynamic and optical properties of the quasi-one-dimensional quantum antiferromagnets TiOCl and TiOBr, which have been discussed as spin-Peierls compounds. The observed deviations from canonical spin-Peierls behavior, e.g. the existence of two distinct phase transitions, have been attributed previously to strong orbital fluctuations. This can be ruled out by our optical data of the orbital excitations. We show that the frustration of the interchain interactions in the bilayer structure gives rise to incommensurate order with a subsequent lock-in transition to a commensurate dimerized state. In this way, a single driving force, the spin-Peierls mechanism, induces two separate transitions.

4 pages, 4 figures

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• Giant phonon anomalies in the pseudo-gap phase of TiOCl
• Heat capacity of the quantum magnet TiOCl
• Correlation effects on the electronic structure of TiOCl: a NMTO+DMFT study
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Cited by in corpus (41)

• The Chemistry of Quantum Spin Liquids
• Strong Magneto-elastic coupling in VOCl: Neutron and synchrotron powder x-ray diffraction study
• Two pressure-induced transitions in TiOCl: Mott insulator to anisotropic metal
• Electronic structure of the two-dimensional Heisenberg antiferromagnet VOCl: a multi-orbital Mott insulator
• Pressure-induced insulator-to-metal transition in low-dimensional TiOCl
• Spin-Peierls transition in TiPO${}_4$
• Spin dynamics in the low-dimensional magnet TiOCl
• X-ray Scattering Study of the spin-Peierls transition and soft phonon behavior in TiOCl
• Collective orbital excitations in orbitally ordered YVO3 and HoVO3
• Enhanced dimerization of TiOCl under pressure: spin-Peierls - to - Peierls transition
• Muon-spin relaxation measurements on the dimerized spin-1/2 chains NaTiSi2O6 and TiOCl
• Symmetry disquisition on the TiOX phase diagram
• Spinon Excitations in the Quasi-1D S = 1/2 Chain Cs4CuSb2Cl12
• Mott-Hubbard gap closure and structural phase transition in the oxyhalides TiOBr and TiOCl under pressure
• Microscopic model for transitions from Mott to spin-Peierls insulator in TiOCl
• 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
• Photoemission of a doped Mott insulator: spectral weight transfer and qualitative Mott-Hubbard description
• Can the Mott Insulator TiOCl be Metallized by Doping? A First-Principles Study
• Density functional study of the electronic and vibrational properties of TiOCl
• Commensurate Fluctuations in the Pseudogap and Incommensurate spin-Peierls Phases of TiOCl
• Ab initio computation of d-d excitation energies in low-dimensional Ti and V oxychlorides
• Cluster Dynamical Mean-field calculations for TiOCl
• Strong magnetoelastic coupling at the transition from harmonic to anharmonic order in NaFe(WO${}_4$)${}_2$ with 3d${}^5$ configuration
• Theory of Raman Scattering in One-Dimensional Quantum Spin-1/2 Antiferromagnets
• Momentum-resolved single-particle spectral function for TiOCl from a combination of density functional and variational cluster calculations
• Singlet-Triplet Excitations in the Unconventional Spin-Peierls System TiOBr
• Lattice and orbital fluctuations in TiPO4
• Critical properties of the unconventional spin-Peierls system TiOBr
• Suppression of the commensurate spin-Peierls state in Sc-doped TiOCl
• Microscopic theory for the incommensurate transition in TiOCl
• Two pressure-induced structural phase transitions in TiOCl
• High pressure x-ray study of spin-Peierls physics in the quantum spin chain material TiOCl
• Dimerization process and elementary excitations in spin-Peierls chains coupled by frustrated interactions
• Pressure-driven phase transitions in correlated systems
• Absence of static magnetic order in lightly-doped Ti1-xScxOCl down to 1.7 K
• NMR Evidence of Charge Fluctuations in Multiferroic CuBr2
• Heat conductivity of the spin-Peierls compounds TiOCl and TiOBr
• Relevance of nonadiabatic effects in TiOCl
• Incommensurate spin Luttinger liquid phase in a model for the spin-Peierls materials TiOBr and TiOCl
• Study of the pressure effects in TiOCl by ab initio calculations