Hard X-ray and extremely low energy bulk-sensitive photoelectron spectroscopy has been performed in the temperature range of 100-330K for Fe 3O4. In the high temperature phase just above the Verwey transition, the intensity at the Fermi level (EF) is still very weak, but it increases gradually with further increasing the temperature (250 K, 330 K) in consistence with the temperature dependence of the conductivity. The spectral behaviors near EF with temperature are well explained by the polaronic model, which shows the change from small polaron to large polaron.
- Photoelectron spectroscopy
- Strongly correlated electron system
- Verwey transition
ASJC Scopus subject areas
- Physics and Astronomy(all)