ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Unveiling the nature superconducting gap structure in disordered simple cubic Au0.17Sb0.83
Abstract: Antimony (Sb), being a semimetal, shows superconductivity when substituted with 17.5% Au and stabilized in a simple cubic structure in high-temperature and high-pressure synthesis. The normal state heat capacity analysis suggests a strong electron-phonon coupling with a nominal density of states of value 0.58 states per eV per f.u. The superconducting heat capacity deviates from the BCS single-gap s-wave model. A single-gap ?-model fit yields ? = 2.02?kBTc, exceeding the weak-coupling BCS value of 1.76?kBTc. A two-gap isotropic s + s-wave model also fits the data, with gap ratios of 0.41:0.59 and magnitudes ?? = 2.08?kBTc and ?? = 1.96?kBTc. However, the similarity between gap values and their contributions causes significant overlap with the ?-model, making it difficult to confirm multigap behavior. Further, there has been no investigation that probes the pairing mechanism in this kind of binary disordered compounds with a simple cubic structure. Therefore, we propose to perform muon spin rotation (?SR) experiments on this sample that could provide valuable insights into the underlying superconducting gap structure and help verify the presence of multigap superconductivity in it.
Principal Investigator: Professor Athinarayanan Sundaresan
Experimenter: Dr Peter Baker
Local Contact: Dr Rhea Stewart
Experimenter: Mr Souvik Banerjee
DOI: 10.5286/ISIS.E.RB2520449
ISIS Experiment Number: RB2520449
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2520449-1 | MUSR | 02 March 2029 | Download |
Publisher: STFC ISIS Neutron and Muon Source
Data format: RAW/Nexus
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Data Citation
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[author], [date], [title], [publisher],
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For Example:
Professor Athinarayanan Sundaresan et al; (2026): Unveiling the nature superconducting gap structure in disordered simple cubic Au0.17Sb0.83, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520449
Data is released under the CC-BY-4.0 license.
