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.

arXiv comment7 pages, 8 figures

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Cited by in corpus (21)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• One-Dimensional Quantum Liquids: Beyond the Luttinger Liquid Paradigm
• Spin and charge dynamics of the one-dimensional extended Hubbard model
• 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
• Two-Spinon and Orbital Excitations of the Spin-Peierls System TiOCl
• X-ray Scattering Study of the spin-Peierls transition and soft phonon behavior in TiOCl
• Spin dynamics in the low-dimensional magnet TiOCl
• Muon-spin relaxation measurements on the dimerized spin-1/2 chains NaTiSi2O6 and 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
• Photoemission of a doped Mott insulator: spectral weight transfer and qualitative Mott-Hubbard description
• Variational wave functions for the spin-Peierls transition in the Su-Schrieffer-Heeger model with quantum phonons
• Can the Mott Insulator TiOCl be Metallized by Doping? A First-Principles Study
• 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
• Pressure-driven phase transitions in correlated systems
• Heat conductivity of the spin-Peierls compounds TiOCl and TiOBr