Local magnetic order in La2CuO4 seen via μ+SR spectroscopy

Local magnetic order in La2CuO4 seen via μ+SR spectroscopy

The origin of a pseudogap in the underdoped phase of cuprates has become one of the leading issues in understanding the mechanism(s) of high-Tc superconductivity. Several experiments (i.e. polarized neutron diffraction studies) support theoretical models based on the circulating current (CC) picture...

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Hauptverfasser: Storchak, V G, Brewer, J H, Eshchenko, D G, Mengyan, P W, Parfenov, O E, Tokmachev, A M, Dosanjh, P, Barilo, S N
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Antiferromagnetism
Cuprates
Magnetic fields
Magnetic moments
Magnetism
Neutron diffraction
Physics
Spectroscopy
Spectrum analysis
Superconductivity
Superconductors
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Zusammenfassung:The origin of a pseudogap in the underdoped phase of cuprates has become one of the leading issues in understanding the mechanism(s) of high-Tc superconductivity. Several experiments (i.e. polarized neutron diffraction studies) support theoretical models based on the circulating current (CC) picture. These CC models suggest a novel ordered phase formed by orbital magnetic moments caused by spontaneous orbital currents. However to date, μSR experiments in cuprate superconductors have not revealed any magnetic field higher than 0.2 G associated with orbital moments. Here we present high magnetic field μSR spectroscopy of a stoichiometric La2CuO4 crystal which shows antiferromagnetic splittings and additional 45 G line splittings, consistent with orbital currents.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/551/1/012024