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.
Critical spin fluctuations at the collapse of the pseudogap in a cuprate superconductor
Abstract: The unusual metallic state of cuprates above their critical temperature remains poorly understood. It is crucial to understand this state, as superconductivity emerges from it. The normal state shows "strange metal" behavior where the resistivity proportional to T. The resistivity of a metal is usually interpreted as the relaxation rate of the electrons transporting current. Strange metal behavior occurs in many materials (twisted bilayer graphene, heavy fermions, iron-based superconductor...). It is found that the relaxation rate is comparable to T in contrast to the quadratic variation seen in conventional Fermi liquids. In order to shed light of this we have investigated low energy spin fluctuations in La2-xSrxCuO4 and found a new component to the spin fluctuation that varies rapidly with temperature in LaxSrxCuO4(x=0.22). This component also shows E/T scaling in the dynamic susceptibility and the peak width of the excitations. Thus the spin fluctuations appear to be at the heart of the strange metal behavior. Here we propose to investigate another doping for La2-xSrxCuO4, x=0.19, where the where the pseudogap disappears at T=0. We will see whether the quantum critical behavior persists, and how it evolves with doping. Specifically, how the dynamical critical exponents (z and alpha) change with doping.
Principal Investigator: Professor Stephen Hayden
Local Contact: Dr George Wood
Experimenter: Miss Sai Potturu
DOI: 10.5286/ISIS.E.RB2610479
ISIS Experiment Number: RB2610479
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2610479-1 | LET | 27 May 2029 | Download |
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 Hayden et al; (2026): Critical spin fluctuations at the collapse of the pseudogap in a cuprate superconductor, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610479
Data is released under the CC-BY-4.0 license.
