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| Título: | Hard x-ray probe to study doping-dependent electron redistribution and strong covalency in La1−xSr1+xMnO4 |
Autor: | Herrero Martín, Javier CSIC ORCID; García, Joaquín CSIC ORCID; Blasco, Javier CSIC ORCID | Fecha de publicación: | ago-2010 | Editor: | American Physical Society | Citación: | Physical Review B 82(7): 075112 (2010) | Resumen: | The doping dependence of the occupied 3d states at the Mn sites of La1−xSr1+xMnO4 (x=0, 0.3, and 0.5) was studied by means of nonresonant hard x-ray emission spectroscopy. For the single-crystalline samples, we observe a linear dichroism of the Mn Kβ main lines (3p to 1s transitions) that is strongest for x=0 and decreases with increasing hole doping x. At the same time, the Mn Kβ main lines of polycrystalline samples, i.e., the angular-integrated spectra, remain almost unchanged upon hole doping. The linear dichroism in the single crystals and the invariance of the Kβ lines in polycrystals lead to the conclusion that hole doping causes a spatial redistribution of the 3d electrons without reducing the total charge and spin density at the manganese sites. This implies that the doped holes in La1−xSr1+xMnO4 must have a strong oxygen 2p character. Many-body cluster calculations are presented that support these findings. | Descripción: | 8 páginas, 7 figuras.-- PACS number(s): 71.28.+d, 78.70.En, 71.10.-w, 75.47.Lx.-- et al. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.82.075112 | URI: | http://hdl.handle.net/10261/47653 | DOI: | 10.1103/PhysRevB.82.075112 | ISSN: | 1098-0121 | E-ISSN: | 1550-235X |
| Aparece en las colecciones: | (ICMA) Artículos |
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| Fichero | Descripción | Tamaño | Formato | |
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| e075112.pdf | 390,42 kB | Adobe PDF |  Visualizar/Abrir |
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