4f crystal field ground state of the strongly correlated topological insulator SmB6

• Verfasst von: Sundermann, Martin [VerfasserIn]
• Verfasst von: Haverkort, Maurits W. [VerfasserIn]
• Titel: 4f crystal field ground state of the strongly correlated topological insulator SmB6
• Verf.angabe: M. Sundermann, H. Yavaş, K. Chen, D.J. Kim, Z. Fisk, D. Kasinathan, M.W. Haverkort, P. Thalmeier, A. Severing, and L.H. Tjeng
• Fussnoten: Im Titel ist die Ziffer "6" tiefgestellt ; Gesehen am 30.05.2018
• Titel Quelle: Enthalten in: Physical review letters
• Jahr Quelle: 2018
• Band/Heft Quelle: 120(2018,1) Artikel-Nummer 016402, 6 Seiten
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.120.016402
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1575840065

Abstract

We investigated the crystal-electric field ground state of the 4f manifold in the strongly correlated topological insulator SmB6 using core-level nonresonant inelastic x-ray scattering. The directional dependence of the scattering function that arises from higher multipole transitions establishes unambiguously that the Γ8 quartet state of the Sm f5 J=5/2 configuration governs the ground-state symmetry and, hence, the topological properties of SmB6. Our findings contradict the results of density functional calculations reported so far.