Charge Density Wave in Iron Arsenide Superconductors
Author Information
Author(s): Hu Quanxin, Zheng Yu, Xu Hanxiang, Deng Junze, Liang Chenhao, Yang Fazhi, Wang Zhijun, Grinenko Vadim
Primary Institution: Shanghai Jiao Tong University
Hypothesis
Can charge density wave (CDW) order emerge in heavily hole-doped iron arsenide superconductors?
Conclusion
The study demonstrates that a charge density wave emerges on the surface of heavily hole-doped Ba1−xKxFe2As2, completely suppressing superconductivity.
Supporting Evidence
- The charge density wave order was confirmed through scanning tunneling microscopy.
- The emergence of the charge density wave was linked to saddle-point nesting near the Fermi level.
- The study expands the phase diagram of iron-based superconductors.
- The charge density wave completely suppresses superconductivity in the heavily hole-doped regime.
Takeaway
The researchers found that when they added holes to a special type of iron superconductor, it created a pattern that stopped it from being a superconductor.
Methodology
The study used scanning tunneling microscopy and density functional theory to investigate the charge density wave on the surface of Ba1−xKxFe2As2.
Limitations
The observed charge density wave appears to be exclusive to the surface and may not represent the bulk properties.
Digital Object Identifier (DOI)
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