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.
Magnetic excitations of a new pressure-induced Kondo lattice superconductor
Abstract: In unconventional superconductors such as heavy fermion and high-Tc superconductors, the superconductivity is believed to be mediated by spin fluctuations, rather than the electron-phonon pairing mechanism of conventional BCS theory. However, the microscopic mechanisms of spin-fluctuation mediated superconductivity are not yet determined, and in particular there is a lack of understanding as to which types of spin fluctuations are favourable for forming unconventional Cooper pairs. Here we propose to probe the low temperature magnetic excitations of single crystals of CeSb2 at ambient pressure using inelastic neutron scattering. CeSb2 is antiferromagnetic at ambient pressure, and was recently found to exhibit superconductivity under pressure upon the suppression of antiferromagnetism, with highly unusual behaviour of the upper critical field. We propose to map the spin-waves in the antiferromagnetic state, and paramagnons in the paramagnetic state, of CeSb2, so as to determine the underlying magnetic exchange interactions. Since these magnetic interactions give rise to both the ordered magnetic state at ambient pressure, and the unconventional, possibly spin-triplet, heavy fermion superconductivity under pressure, our study can provide important information about the characteristics of spin fluctuations giving rise to unconventional superconductivity.
Public release date: 04 March 2025
Principal Investigator: Professor Michael Smidman
Local Contact: Dr Christian Balz
Experimenter: Mr Jiayu Guo
Experimenter: Mr Zhaoyang Shan
Experimenter: Mr Yu Tang
Local Contact: Dr Devashi Adroja
Experimenter: Dr Yu Song
Experimenter: Mr Jinyu Wu
DOI: 10.5286/ISIS.E.RB2320153-1
Parent DOI: 10.5286/ISIS.E.RB2320153
ISIS Experiment Number: RB2320153
Part Number: 1
Date of Experiment: 17 November 2023
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 Michael Smidman et al; (2023): Magnetic excitations of a new pressure-induced Kondo lattice superconductor, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2320153-1
Data is released under the CC-BY-4.0 license.
