English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The crystal-field (CF) splitting of the $^6H_{5/2}$ Hund's rule ground stateof Sm$^{3+}$ in the strongly correlated topological insulator SmB$_6$ has beendetermined with high resolution resonant inelastic x-ray scattering (RIXS) atthe Sm M$_5$ edge. The valence selectivity of RIXS allows isolating thecrystal-field-split excited multiplets of the Sm$^{3+}$ (4$f^5$) configurationfrom those of Sm$^{2+}$ (4$f^6$) in intermediate valent SmB$_6$. The very largeenergy range of RIXS allows the crystal-field analysis of a high lyingmultiplet at about 2.4\,eV that has the same total angular momentum $J$ as theground state so that ambiguities due to the elastic tail can be avoided. Wefind that the $\Gamma_7$ doublet and $\Gamma_8$ quartet of the $^6H_{5/2}$Hund's rule ground state are split by$\Delta^{CF}_{^6H_{5/2}}$\,=\,20$\pm$10\,meV which sets an upper limit for the4$f$ band width. This indicates an extremely large mass renormalization fromthe band structure value, pointing out the need to consider the coefficients offractional parentage for the hopping of the 4$f$ electrons.

A RIXS investigation of the crystal-field splitting of Sm$^{3+}$ in SmB$_6$