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Two-Spinon and Orbital Excitations of the Spin-Peierls System TiOCl
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Soft X-Ray Physics.
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2011 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 107, no 10, 107402- p.Article in journal (Refereed) Published
Abstract [en]

We combine high-resolution resonant inelastic x-ray scattering with cluster calculations utilizing a recently derived effective magnetic scattering operator to analyze the polarization, excitation energy, and momentum-dependent excitation spectrum of the low-dimensional quantum magnet TiOCl in the range expected for orbital and magnetic excitations (0-2.5 eV). Ti 3d orbital excitations yield complete information on the temperature-dependent crystal-field splitting. In the spin-Peierls phase we observe a dispersive two-spinon excitation and estimate the inter- and intradimer magnetic exchange coupling from a comparison to cluster calculations.

Place, publisher, year, edition, pages
2011. Vol. 107, no 10, 107402- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-158893DOI: 10.1103/PhysRevLett.107.107402ISI: 000294406600015OAI: oai:DiVA.org:uu-158893DiVA: diva2:441846
Available from: 2011-09-19 Created: 2011-09-19 Last updated: 2017-12-08Bibliographically approved

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