Multiple-pseudogap phases in the hydrogen-doped LaFeAsO system
The low-energy electronic structure of LaFeAsO1−H (0.0≤≤0.60), a system which exhibits two superconducting domes and antiferromagnetic orders in its phase diagram, is investigated by utilizing laser photoemission spectroscopy. From the precise temperature-dependent measurement of the spectra near...
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| Other Authors: | , , , , , , , |
| Format: | article |
| Published: |
2017
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| Online Access: | http://hdl.handle.net/10725/16704 https://doi.org/10.1103/PhysRevB.95.064501 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.064501 |
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| Summary: | The low-energy electronic structure of LaFeAsO1−H (0.0≤≤0.60), a system which exhibits two superconducting domes and antiferromagnetic orders in its phase diagram, is investigated by utilizing laser photoemission spectroscopy. From the precise temperature-dependent measurement of the spectra near the Fermi level, we find a suppression of the density of states with cooling, namely a pseudogap formation, for all doping range. The pseudogap gets suppressed on doping through the first superconducting dome regime to the higher- region, whereas it tends to recover when further increasing toward the second antiferromagnetic ordered phase. The systematic doping dependence indicates the different origins of pseudogaps in the low- and high- regions, possibly related to the respective antiferromagnetic ground states residing at both ends of the phase diagram. |
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