Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-07-31
Phys. Rev. B 78, 020406 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 4 figures
Scientific paper
10.1103/PhysRevB.78.020406
We have studied the effects of band filling and bandwidth control on the chemical potential in perovskite manganites $R_{1-x}A_x$MnO$_3$ ($R$ : rare earth, $A$ : alkaline earth) by measurements of core-level photoemission spectra. A suppression of the doping-dependent chemical potential shift was observed in and around the CE-type charge-ordered composition range, indicating that there is charge self-organization such as stripe formation or its fluctuations. As a function of bandwidth, we observed a downward chemical potential shift with increasing bandwidth due to the reduction of the orthorhombic distortion. After subtracting the latter contribution, we found an upward chemical potential shift in the ferromagnetic metallic region $0.3
Ebata K.
Fujimori Atsushi
Kuwahara Hideki
Takizawa Motokazu
Tokura Yasuhiro
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