Two-spinon and orbital excitations of the spin-Peierls system TiOCl

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 r...

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Hauptverfasser: Glawion, Sebastian (VerfasserIn) , Haverkort, Maurits W. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 1 September 2011
In: Physical review letters
Year: 2011, Jahrgang: 107, Heft: 10
ISSN:1079-7114
DOI:10.1103/PhysRevLett.107.107402
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.107.107402
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.107.107402
Volltext
Verfasserangaben:S. Glawion, J. Heidler, M.W. Haverkort, L.C. Duda, T. Schmitt, V.N. Strocov, C. Monney, K.J. Zhou, A. Ruff, M. Sing, and R. Claessen

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520 |a 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. 
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