ISIS Neutron and Muon Source Data Journal

Crossover between diffusive and ballistic transport regimes in the S=1/2 Heisenberg antiferromagnetic chain SrCuO2

Abstract: The question of whether the spin transport in an S=1/2 Heisenberg antiferromagnetic chain is ballistic or diffusive remains intensely discussed theoretically and studied experimentally. While spin transport in an integrable spin-1/2 chain would normally be expected to be ballistic, a number of experiments have found evidence for either type of transport of different systems and even cross-over regimes in certain systems. These findings can be explained in the context of recent theoretical work by Sirker et al. [1] who argue that both channels are present, with a cross-over taking place at an energy scale determined by the magnetic exchange and temperature. Here we propose to study the spin transport in the highly-ideal spin-1/2 chain SrCuO2, which due to its very large exchange constant (J=2100 K) should allow sensitive tuning between the two competing regimes in large magnetic fields.

Principal Investigator: Dr Johannes Moeller
Local Contact: Dr Francis Pratt

DOI: 10.5286/ISIS.E.RB1510086

ISIS Experiment Number: RB1510086

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Johannes Moeller et al; (2015): Crossover between diffusive and ballistic transport regimes in the S=1/2 Heisenberg antiferromagnetic chain SrCuO2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1510086

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