Pressure and temperature dependences of the electronic structure of the heavy-fermion superconductor CeIrSi3 have been investigated using partial fluorescence yield x-ray absorption spectroscopy and resonant x-ray emission spectroscopy at the Ce L3 edge. Ce is in a weakly mixed valence state at ambient pressure, mostly f1 with a small contribution from the f0 component. Pressure-induced increase of the Ce valence becomes apparent above 4 GPa, concomitantly with the disappearance of the superconductivity. No temperature dependence of the Ce valence is observed within the measured temperature range down to 24 K.
|Journal||journal of the physical society of japan|
|Publication status||Published - Dec 2011|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)