Interlayer coupling and electronic structure of misfit-layered bismuth-based cobaltites
| Autor: | Sho-ichi Takakura, Junpei Azuma, Isamu Yamamoto, Eishi Tanaka, Makoto Maki |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Condensed matter physics Spectral weight Photoemission spectroscopy Binding energy chemistry.chemical_element 02 engineering and technology Electronic structure Photon energy 021001 nanoscience & nanotechnology 01 natural sciences Bismuth Condensed Matter::Materials Science chemistry Transmission electron microscopy Lattice (order) 0103 physical sciences Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 95 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | The ${[{\mathrm{Bi}}_{2}{M}_{2}{\mathrm{O}}_{4}]}_{p}{\mathrm{CoO}}_{2}$ materials ($M=\text{Ca}$, Sr, and Ba) were studied to clarify the effect of the lattice incommensurability on electronic properties using angle-resolved photoemission spectroscopy and transmission electron microscopy (TEM). Results show that the insulating behavior is characterized by a spectral weight for binding energies higher than 2.0 eV. Moreover, the spectral shape is modified as a function of the incident photon energy, demonstrating a close relationship between the electrical properties and interlayer coupling. TEM results show that the effect of the lattice mismatch differs for different misfit parameters $p$. We therefore conclude that the carrier concentration and the chemical environment at the misfit interface, which depend on the degree of incommensurability, mutually determine the electronic properties of the system. |
| Databáze: | OpenAIRE |
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