ISIS Neutron and Muon Source Data Journal

Low energy fluctuations near quantum criticality in CeRh6(Ge1􀀀xSix)4

Abstract: In Ce-based heavy fermion materials, there is competition between the interactions which lead to a magnetically ordered arrangement of the Ce magnetic moments, and the hybridization between the local moments and conduction electrons, which quenches the local moments. Sometimes the magnetic transition can be tuned to zero temperature at a quantum critical point (QCP), where unusual properties arise due to quantum fluctuations. CeRh6Ge4 orders magnetically at a low temperature of 2.5 K, but by swapping Si for Ge, the magnetism is suppressed and eventually disappears, likely at a QCP. We propose to measure doped and undoped samples using low-energy inelastic neutron scattering, so as to probe the magnetic ground state and unusual spin fluctuations near a QCP. In particular, the scaling of the low energy scattering provides crucial information about the type of QCP.

Principal Investigator: Professor Michael Smidman
Local Contact: Dr Franz Demmel
Experimenter: Dr Devashi Adroja
Experimenter: Professor Huiqiu Yuan

DOI: 10.5286/ISIS.E.RB1820611

ISIS Experiment Number: RB1820611

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; (2018): Low energy fluctuations near quantum criticality in CeRh6(Ge1􀀀xSix)4 , STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1820611

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