Spin-orbital separation in the quasi 1D Mott-insulator Sr2CuO3

• Verfasst von: Schlappa, Justina [VerfasserIn]
• Verfasst von: Haverkort, Maurits W. [VerfasserIn]
• Titel: Spin-orbital separation in the quasi 1D Mott-insulator Sr2CuO3
• Verf.angabe: J. Schlappa, K. Wohlfeld, K.J. Zhou, M. Mourigal, M.W. Haverkort, V.N. Strocov, L. Hozoi, C. Monney, S. Nishimoto, S. Singh, A. Revcolevschi, J.-S. Caux, L. Patthey, H.M. Rønnow, J. van den Brink, and T. Schmitt
• Fussnoten: Die Ziffern 2 und 3 im Titel sind tiefgestellt ; Gesehen am 27.11.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2012
• Band/Heft Quelle: (2012) Artikel-Nummer 1205.1954, 35 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565720709

Abstract

As an elementary particle the electron carries spin \hbar/2 and charge e. When binding to the atomic nucleus it also acquires an angular momentum quantum number corresponding to the quantized atomic orbital it occupies (e.g., s, p or d). Even if electrons in solids form bands and delocalize from the nuclei, in Mott insulators they retain their three fundamental quantum numbers: spin, charge and orbital[1]. The hallmark of one-dimensional (1D) physics is a breaking up of the elementary electron into its separate degrees of freedom[2]. The separation of the electron into independent quasi-particles that carry either spin (spinons) or charge (holons) was first observed fifteen years ago[3]. Using Resonant Inelastic X-ray Scattering on the 1D Mott-insulator Sr2CuO3 we now observe also the orbital degree of freedom separating. We resolve an orbiton liberating itself from spinons and propagating through the lattice as a distinct quasi-particle with a substantial dispersion of ~0.2 eV.