Novel Kondo-like behavior near magnetic instability in SmB${}_6$ : temperature and pressure dependences of Sm valence

N. Emi, N. Kawamura, M. Mizumaki +8

We report a systematic study of Sm valence in the prototypical intermediate valence compound SmB${}_6$. Sm mean valence, $v_{\mathrm{Sm}}$, was measured by X-ray absorption spectroscopy a…