ISIS Neutron and Muon Source Data Journal

Investigation of a spin-resonance in unconventional superconductor YFe2Ge2

Abstract: In the layered iron-based superconductor YFe2Ge2, a high Sommerfeld ratio of order 100 mJ/mol K^2 and a T^3/2 temperature dependence of the electrical resistivity at low temperature indicate strong electronic correlations and point towards an unconventional pairing state. Theoretical proposals for the superconducting state include s+- or triplet pair wavefunctions and there are striking structural and electronic similarities to some of the iron pnictide superconductors. Investigation of magnetic excitations in the superconducting state by inelastic neutron scattering experiments has been held back by the lack of high quality, bulk superconducting samples. We are now able to grow single crystals with a bulk Tc of about 1.1K and RRR > 300. Inelastic neutron measurements of the superconducting state in these crystals will provide a step forward in understanding the pairing state in YFe2Ge2.

Public release date: 11 March 2023

Principal Investigator: Professor Malte Grosche
Experimenter: Mr Stephen Hodgson
Experimenter: Dr Devashi Adroja
Experimenter: Professor Jiasheng Chen
Local Contact: Dr David Voneshen
Experimenter: Mr Ran Tao
Experimenter: Mr Theo Weinberger

DOI: 10.5286/ISIS.E.RB1920215-1

Parent DOI: 10.5286/ISIS.E.RB1920215

ISIS Experiment Number: RB1920215

Part Number: 1

Date of Experiment: 04 March 2020

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:
Professor Malte Grosche et al; (2020): Investigation of a spin-resonance in unconventional superconductor YFe2Ge2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1920215-1

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