Antiferromagnetic order and its interplay with superconductivity in CaK(Fe$_{1-x}$Mn$_x$)$_4$As$_4$
| Autor: | Wilde, J. M., Sapkota, A., Ding, Q. -P., Xu, M., Tian, W., Bud'ko, S. L., Furukawa, Y., Kreyssig, A., Canfield, P. C. |
|---|---|
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | J. Phys.: Condens. Matter 35 395801 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1361-648X/ace093 |
| Popis: | The magnetic order for several compositions of CaK(Fe$_{1-x}$Mn$_x$)$_4$As$_4$ has been studied by nuclear magnetic resonance (NMR), M\"ossbauer spectroscopy, and neutron diffraction. Our observations for the Mn-doped 1144 compound are consistent with the hedgehog spin vortex crystal (hSVC) order which has previously been found for Ni-doped $\text{Ca}\text{K}\text{Fe}_4\text{As}_4$. The hSVC state is characterized by the stripe-type propagation vectors $(\pi\,0)$ and $(0\,\pi)$ just as in the doped 122 compounds. The hSVC state preserves tetragonal symmetry at the Fe site, and only this SVC motif with simple AFM stacking along $\textbf{c}$ is consistent with all our observations using NMR, M\"ossbauer spectroscopy, and neutron diffraction. We find that the hSVC state in the Mn-doped 1144 compound coexists with superconductivity (SC), and by combining the neutron scattering and M\"ossbauer spectroscopy data we can infer a quantum phase transition, hidden under the superconducting dome, associated with the suppression of the AFM transition temperature ($T_\text{N}$) to zero for $x\approx0.01$. In addition, unlike several 122 compounds and Ni-doped 1144, the ordered magnetic moment is not observed to decrease at temperatures below the superconducting transition temperature ($T_\text{c}$). Comment: 10 pages and 10 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|