Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-03-02
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 5 figures, submitted to PRL
Scientific paper
10.1103/PhysRevLett.93.126404
Ru 3d core-level x-ray photoemission spectra of various ruthenates are examined. They show in general two-peak structures, which can be assigned as the screened and unscreened peaks. The screened peak is absent in a Mott insulator, but develops into a main peak in the metallic regime. This spectral behavior is well explained by the dynamical mean-field theory calculation for the single-band Hubbard model with on-site core-hole potential using the exact diagonalization method. The new mechanism of the core-level photoemission satellite can be utilized to reveal the Mott transition phenomenon in various strongly correlated electron systems, especially in nano-scale devices and phase-separated materials.
Kim Hyeong-Do
Kim Kyung Hyuk
Noh Han-Jin
Oh Seung Joon
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