ISIS Neutron and Muon Source Data Journal

Study of unconventional superconductivity in YFe2Ge2 using muon spin rotation and relaxation measurements

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. Microscopic studies of the superconducting pairing state by muSR have been held back by the lack of high quality, bulk superconducting samples without ferromagnetic alien phases. We are now able to grow single crystals with a bulk Tc of about 1.1 K and RRR > 130. With this new generation of crystals, muSR measurements can produce a step advance in our understanding of the superconducting pairing state in YFe2Ge2.

Principal Investigator: Professor Malte Grosche
Experimenter: Dr Jiasheng Chen
Local Contact: Dr Pabitra Biswas
Experimenter: Dr Devashi Adroja

DOI: 10.5286/ISIS.E.RB1910246

ISIS Experiment Number: RB1910246

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; (2019): Study of unconventional superconductivity in YFe2Ge2 using muon spin rotation and relaxation measurements, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910246

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