ISIS Neutron and Muon Source Data Journal

High Energy Spin Fluctuations in YFe2Ge2

Abstract: The recently discovered superconductor YFe2Ge2 (Tc about 1.8K) has the same crystal structure as 122 iron-based superconductors, with no static magnetic order be reported. However, our recent triple-axis experiment revealed strong spin fluctuations at Q=(1,0,1), corresponding to a stripe antiferromagnetic correlation consistent with in the 122 systems. Thus, there comes a contradiction between the similarity to 122 systems and the rather low Tc in YFe2Ge2. In order to have further understanding of the superconducting mechanism of this compound, we propose an experiment on the high energy spin fluctuations in YFe2Ge2, which will enable us to determine the effective Hamiltonian and to make a direct comparison with the 122 iron-based superconductors. Our experiment will shed some lights on the mechanism of pairing and the origin of low Tc. We request a 7 days' beam time for MAPS.

Principal Investigator: Mr Jun Zhao
Experimenter: Dr Hongliang Wo
Local Contact: Dr Toby Perring
Experimenter: Mr Zheng He
Experimenter: Mr Shoudong Shen

DOI: 10.5286/ISIS.E.RB1620272

ISIS Experiment Number: RB1620272

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:
Mr Jun Zhao et al; (2016): High Energy Spin Fluctuations in YFe2Ge2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1620272

Data is released under the CC-BY-4.0 license.