Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.067003
Keywords
-
Categories
Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan [20102005, 21102505]
- Japan Society for the Promotion of Science [22244039, 22540380]
- Grants-in-Aid for Scientific Research [21102505, 22540380] Funding Source: KAKEN
Ask authors/readers for more resources
A neutron scattering study of heavily hole-overdoped superconducting KFe2As2 revealed a well-defined low-energy incommensurate spin fluctuation at [pi(1 +/- 2 delta), 0] with delta = 0.16. The incommensurate structure differs from the previously observed commensurate peaks in electron-doped AFe(2)As(2) (A = Ba, Ca, or Sr) at low energies. The direction of the peak splitting is perpendicular to that observed in Fe(Te, Se) or in Ba(Fe, Co)(2)As-2 at high energies. A band structure calculation suggests interband scattering between bands around the Gamma and X points as an origin of this incommensurate peak. The perpendicular direction of the peak splitting can be understood within the framework of multiorbital band structure. The results suggest that spin fluctuation is more robust in hole-doped than in electron-doped samples, which can be responsible for the appearance of superconductivity in the heavily hole-doped samples.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available