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

Phys. Rev. B 72, 125127 (2005) 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 an...

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Main Authors Hoinkis, M, Sing, M, Schaefer, J, Klemm, M, Horn, S, Benthien, H, Jeckelmann, E, Saha-Dasgupta, T, Pisani, L, Valenti, R, Claessen, R
Format Journal Article
LanguageEnglish
Published 08.06.2005
Subjects
Physics - Strongly Correlated Electrons
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Summary:Phys. Rev. B 72, 125127 (2005) 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.
DOI:10.48550/arxiv.cond-mat/0506203