Unusual quasi-one-dimensional electron dispersions in the spin-1/2 quantum magnet TiOCl

Abstract

We have studied the electronic structure of the spin-1/2 quantum magnet TiOCl by polarization-dependent momentum-resolved photoelectron spectroscopy. From that, we confirm the quasi-one-dimensional nature of the electronic structure along the crystallographic b-axis and find no evidence for sizable phonon-induced orbital fluctuations as origin for the non-canonical phenomenology of the spin-Peierls transition in this compound. A comparison of the experimental data to our own LDA+U and Hubbard model calculations reveals a striking lack of understanding regarding the quasi-one-dimensional electron dispersions in the normal state of this compound.

7 pages, 8 figures

Cited by in corpus (13)

• Spin and charge dynamics of the one-dimensional extended Hubbard model
• Electronic structure of the two-dimensional Heisenberg antiferromagnet VOCl: a multi-orbital Mott insulator
• Two pressure-induced transitions in TiOCl: Mott insulator to anisotropic metal
• Spin dynamics in the low-dimensional magnet TiOCl
• X-ray Scattering Study of the spin-Peierls transition and soft phonon behavior in TiOCl
• Microscopic model for transitions from Mott to spin-Peierls insulator in TiOCl
• Manipulating Multiple Order Parameters via Oxygen Vacancies: The case of Eu0.5Ba0.5TiO3-δ
• One-dimensional versus two-dimensional correlation effects in the oxyhalides TiOCl and TiOBr
• Variational wave functions for the spin-Peierls transition in the Su-Schrieffer-Heeger model with quantum phonons
• Density functional study of the electronic and vibrational properties of TiOCl
• Cluster Dynamical Mean-field calculations for TiOCl
• Momentum-resolved single-particle spectral function for TiOCl from a combination of density functional and variational cluster calculations
• Heat conductivity of the spin-Peierls compounds TiOCl and TiOBr