- By:
- Fuhrman, W.; Leiner, Jonathan C; Nikolic, P; Granroth, Garrett E; Stone, Matthew B; Lumsden, Mark D; Debeer-Schmitt, Lisa M; Alekseev, Pavel ; Mignot, Jean-Michel; Koohpayeh, S; Cottingham, P; Phelan, William A; Schoop, L; Cava, R.; McQueen, T.; Broholm, C.
- Journal Name:
- Physical Review Letters
- Page Number:
- 36401
- Volume:
- 114
- Issue Number:
- N/A
- Publication Date:
- March 6, 2015
Abstract
Using inelastic neutron scattering, we map a 14 meV resonant mode in SmB6 and describe its relation to the low energy insulating band structure. The resonant intensity is sharply conned to the X and R high symmetry points and disperses less than 2 meV through the zone. Repeating outside the rst Brillouin zone, the mode is coherent with a 5d-like magnetic form factor. We describe how band inversion in cubic symmetry can be inferred from neutron scattering and show that a slave boson treatment of a 3rd-neighbor dominated hybridized 2 species (d/f) band structure can produce a spin exciton with the observed characteristics.
