The electronic structure of EuPd$_2$Si$_2$ in the vicinity of the
critical endpoint
The electronic structure of EuPd$_2$Si$_2$ in the vicinity of the
critical endpoint
Hard X-ray angle-resolved photoemission spectroscopy reveals significant alterations in the valence band states of EuPd$_2$Si$_2$ at a temperature $T_V$, where the Eu ions undergo a temperature-induced valence crossover from a magnetic Eu$^{2+}$ state to a low-temperature valence-fluctuating state. The introduction of small amounts of Au on Pd lattice sites and …