Temperature-dependent Fermi surface of the misfit cobaltite[Bi2Sr2O4]0.51CoO2: A comparison with[Bi2Ba2O4]0.50CoO2
| Autor: | Fusao Ichikawa, Sho Ichi Takakura, Makoto Maki, Junpei Azuma, Isamu Yamamoto, Emi Koga |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
010304 chemical physics Photoemission spectroscopy Binding energy Fermi surface 02 engineering and technology Electronic structure 021001 nanoscience & nanotechnology 01 natural sciences Cobaltite Crystallography chemistry.chemical_compound chemistry 0103 physical sciences Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Pseudogap Electronic band structure Intensity (heat transfer) |
| Zdroj: | Physical Review B. 93 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.93.165118 |
| Popis: | Angle-resolved photoemission spectroscopy has been performed to investigate the Fermi surface (FS) and the electronic structure of misfit cobaltites, by comparing ${[{\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{O}}_{4}]}_{p}{\mathrm{CoO}}_{2}$ with $[{\mathrm{Bi}}_{2}{\mathrm{Ba}}_{2}{\mathrm{O}}_{4}]{}_{0.50}{\mathrm{CoO}}_{2}$. In $[{\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{O}}_{4}]{}_{0.51}{\mathrm{CoO}}_{2}$, we observed a suppression of spectral weight near the Fermi energy. Nevertheless, the FS can be mapped out by measuring the photoelectron intensity distribution. The FS size changes with temperature. Additionally, results show that the electronic band structure at a higher binding energy was changed by changing the sample temperature. Our results provide insight into the characteristics of the pseudogap state in the misfit-layered cobaltites. The unusual properties are probably related to the local deformations of the incommensurate structure. |
| Databáze: | OpenAIRE |
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