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Tuning from Frustrated Magnetism to Superconductivity in Quasi-One-Dimensional KCr$_3$As$_3$ Through Hydrogen Doping
- Source :
- Phys. Rev. B 100, 220503 (2019)
- Publication Year :
- 2019
-
Abstract
- We report the charge doping of KCr$_3$As$_3$ via H intercalation. We show that the previously reported ethanol bath deintercalation of K$_2$Cr$_3$As$_3$ to KCr$_3$As$_3$ has a secondary effect whereby H from the bath enters the quasi-one-dimensional Cr$_6$As$_6$ chains. Furthermore, we find that - contrary to previous interpretations - the difference between non-superconducting as-grown KCr$_3$As$_3$ samples and superconducting hydrothermally annealed samples is not a change in crystallinity but due to charge doping, with the latter treatment increasing the H concentration in the CrAs tubes effectively electron-doping the 133 compound. These results suggest a new stoichiometry KH$_x$Cr$_3$As$_3$, that superconductivity arises from a suppressed magnetic order via a tunable parameter and pave the way for the first charge-doped phase diagram in these materials.<br />Comment: 15 pages, 9 figures
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 100, 220503 (2019)
- Publication Type :
- Report
- Accession number :
- edsarx.1905.03360
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.100.220503