A Comparison Study of the Effects of Ba and La Doping in Sr2IrO4: Ir–O–Ir Bond Angle and Carrier Concentration
| Autor: | Lei Luo, Yongjian Wang, Changjin Zhang, Jixiang Gong, Hui Han, Yuheng Zhang, D. D. Liang, Tao Han, Jing-Rong Wang, W. K. Zhu, Jun Yang |
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| Rok vydání: | 2017 |
| Předmět: |
Superconductivity
Materials science High-temperature superconductivity Magnetic moment Doping Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials law.invention Condensed Matter::Materials Science Nuclear magnetic resonance Molecular geometry Electrical resistivity and conductivity law Condensed Matter::Superconductivity Lattice (order) 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Charge carrier 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of Superconductivity and Novel Magnetism. 30:3493-3496 |
| ISSN: | 1557-1947 1557-1939 |
| DOI: | 10.1007/s10948-017-4152-z |
| Popis: | We perform a systematic investigation on the effects of Ba and La doping on the lattice and transport properties of Sr2IrO4, which is theoretically predicted to be a host compound of high-temperature superconductivity. We observe a drastic straightening of the Ir–O–Ir bond angle in the Ba-doped samples. The straightening of the bond angle is much weaker in the La-doped samples. It is found that the La doping leads to the introduction of electron-type charge carriers, while the charge carrier concentration does not change too much in the Ba-doped samples. As a result, both the resistivity and the magnetic moments decrease much faster in the La-doped samples, compared to those in the Ba-doped samples. The present results suggest that it is the charge carrier density rather than the Ir–O–Ir bond angle that dominates the magnetic and transport properties of the Sr2IrO4 system. |
| Databáze: | OpenAIRE |
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