ISIS Neutron and Muon Source Data Journal

Dynamic spin correlation length in the hedgehog spin vortex phase and superconducting state of CaK(Fe1-xNix)4As4

Abstract: Magnetism is believed to play an important role in many quantum phenomena such as superconductivity and nematicity in iron-based superconductors. One of the signatures is that the dynamic spin-spin correlation length will always have response to these phase transitions. Recently, a new hedgehog spin-vortex crystal (SVC) order was discovered in CaK(Fe1-xNix)4As4. It would be interesting to study the spin-spin correlation length crossing the superconducting and magnetic transition temperatures in such a unique spin-vortex C4 phase compound without a static nematic order even nematic fluctuations. Thus, we propose to study of the dynamic spin correlation length of low energy spin excitations in CaK(Fe0.96Ni0.04)4As4 (Tc = 20.5 K, TN = 46.5 K) with centimeter-size single crystals by inelastic neutron scattering using high flux chopper spectrometer MAPS or MERLIN.

Public release date: 20 February 2022

Principal Investigator: Dr Hui-Qian Luo
Experimenter: Dr Xiaoyan Ma
Experimenter: Miss CHANG LIU
Local Contact: Dr Ross Stewart
Experimenter: Dr Tao Xie

DOI: 10.5286/ISIS.E.RB1910247-1

Parent DOI: 10.5286/ISIS.E.RB1910247

ISIS Experiment Number: RB1910247

Part Number: 1

Date of Experiment: 17 February 2019

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Hui-Qian Luo et al; (2019): Dynamic spin correlation length in the hedgehog spin vortex phase and superconducting state of CaK(Fe1-xNix)4As4, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910247-1