ISIS Neutron and Muon Source Data Journal

Magnetic excitations and nematic spin correlations of uniaxial-strained KFe0.8Ag1.2Te2

Abstract: KFe0.8Ag1.2Te2 (KFAT) is structurally similar to the parent compounds of iron-based superconductors (PC-IBS). In addition, it also exhibits simultaneous stripe-type magnetic and structural phase transitions. The similarities in KFAT and PC-IBS suggests the 2×2 Fe clusters already contains the essential physics of the nematic state in PC-IBS in the localized limit, and KFAT is an ideal system to study such physics. Here we propose to study the magnetic excitations of uniaxial-strained KFAT (TS,N ~ 35K) at temperatures below and above TS,N by neutron scattering to (1) understand how magnetic excitations connects to the divergent nematic susceptibility seen in magnetic susceptibility, (2) disentangle contributions of spin waves from different domains in the ordered state (as was done for BaFe2As2), and (3) probe the energy dependence of the anisotropy of the continuum at Q1 and Q2.

Principal Investigator: Dr Xingye Lu
Local Contact: Dr Devashi Adroja
Experimenter: Dr Yu Song
Experimenter: Mr ZHEN TAO

DOI: 10.5286/ISIS.E.RB2010581

ISIS Experiment Number: RB2010581

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 Xingye Lu et al; (2020): Magnetic excitations and nematic spin correlations of uniaxial-strained KFe0.8Ag1.2Te2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2010581

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