ISIS Neutron and Muon Source Data Journal

Unconventional superconductivity in a highly two-dimensional organic charge transfer salt

Abstract: Although many organic superconductors can be produced via charge transfer salts of the organic molecule BEDT-TTF, the new compound ??-(BEDT-TTF)2[(H2O)(NH4)2Cr(C2O4)3]·18-crown 6 with superconducting onset at 4 K stands out as having a particularly strong 2D character due to an unusually thick anion layer separating the metallic BEDT-TTF layers. This produces an extremely good example of a highly anisotropic superconductor whose 2D superconducting vortex properties are expected to be well described by Berezinskii-Kosterlitz-Thouless physics. Existing data on the upper critical field for in-plane field orientation exceeds the Pauli limit at low temperature, pointing towards an unconventional character for the superconductivity. This proposal will use TF-muSR to explore the superconducting phase diagram and the vortex properties of the mixed state of this novel superconductor and compare its properties against those of other molecular organic superconductors.

Public release date: 04 March 2027

Experimenter: Professor Stephen Blundell
Experimenter: Dr Lee Martin
Local Contact: Dr Francis Pratt
Experimenter: Dr Adam Berlie

DOI: 10.5286/ISIS.E.RB2310235-1

Parent DOI: 10.5286/ISIS.E.RB2310235

ISIS Experiment Number: RB2310235

Part Number: 1

Date of Experiment: 29 February 2024

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 Stephen Blundell et al; (2024): Unconventional superconductivity in a highly two-dimensional organic charge transfer salt, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2310235-1

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