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

• Verfasst von: Glawion, Sebastian [VerfasserIn]
• Verfasst von: Haverkort, Maurits W. [VerfasserIn]
• Titel: Two-spinon and orbital excitations of the spin-Peierls system TiOCl
• Verf.angabe: 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
• Fussnoten: Gesehen am 03.11.2017
• Titel Quelle: Enthalten in: Physical review letters
• Jahr Quelle: 2011
• Band/Heft Quelle: 107(2011,10) Artikel-Nummer 107402, 4 Seiten
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.107.107402
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1564964906

Abstract

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.