Orbitally driven spin-singlet dimerization in $S$=1 La${}_4$Ru${}_2$O${}_{10}$

Hua Wu, Z. Hu, T. Burnus +11

Using x-ray absorption spectroscopy at the Ru-$L_{2,3}$ edge we reveal that the Ru${}^{4+}$ ions remain in the $S$=1 spin state across the rare 4d-orbital ordering transition and spi…