Electronic structure of from photoelectron spectroscopic studies
| Autor: | R. Suryanarayanan, R. Haumont, J. Chaigneau, R. Kundu, Jean-Michel Kiat, B. R. Sekhar, P. Mishra |
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| Rok vydání: | 2011 |
| Předmět: |
Phase transition
Condensed matter physics Band gap Chemistry Doping Fermi level 02 engineering and technology General Chemistry Electronic structure 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 3. Good health symbols.namesake X-ray photoelectron spectroscopy 0103 physical sciences Materials Chemistry Density of states symbols 010306 general physics 0210 nano-technology Electronic band structure |
| Zdroj: | Solid State Communications. 151:256-258 |
| ISSN: | 0038-1098 |
| DOI: | 10.1016/j.ssc.2010.10.046 |
| Popis: | The valence band electronic structure of the Bi1−xPbxFeO3 (x=0.02–0.15) system which undergoes a R3c to cubic phase transition with Pb doping has been studied by using X-ray and ultra-violet photoelectron spectroscopy. The cubic composition showed an enhancement of the oxygen 2p character in the near Fermi level density of states, possibly due to the weakening of the Fe 3d–O 2p–Bi 6p hybridization strengths following the changes in the topology of the oxygen octahedra in its structure. The compositions with the R3c structure showed a much larger band gap and band width compared to those reported from LSDA+U calculations. We attribute this to a larger effective Coulomb interaction (Ueff). |
| Databáze: | OpenAIRE |
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