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Condensed Matter > Superconductivity
Title: Field-induced electronic phase separation in the high-temperature superconductor La$_{1.94}$Sr$_{0.06}$CuO$_{4+y}$
(Submitted on 26 Jan 2021 (v1), last revised 25 Apr 2024 (this version, v5))
Abstract: We present a combined neutron diffraction and high field muon spin rotation ($\mu$SR) study of the magnetically ordered and superconducting phases of the high-temperature superconductor La$_{1.94}$Sr$_{0.06}$CuO$_{4+y}$ ($T_{\rm c} = 37.5(2)$~K) in a magnetic field applied perpendicular to the CuO$_2$ planes. We observe a linear field-dependence of the intensity of the neutron diffraction peak that reflects the modulated antiferromagnetic stripe order. The magnetic volume fraction extracted from $\mu$SR data likewise increases linearly with applied magnetic field. The combination of these two observations allows us to unambiguously conclude that stripe-ordered regions grow in an applied field, whereas the stripe-ordered magnetic moment itself is field-independent. This contrasts with earlier suggestions that the field-induced neutron diffraction intensity in La-based cuprates is due to an increase in the ordered moment. We discuss a microscopic picture that is capable of reconciling these conflicting viewpoints.
Submission history
From: Sonja Holm-Dahlin [view email][v1] Tue, 26 Jan 2021 10:03:41 GMT (882kb,D)
[v2] Thu, 28 Jan 2021 11:01:15 GMT (882kb,D)
[v3] Fri, 28 Oct 2022 09:43:28 GMT (578kb,D)
[v4] Mon, 16 Oct 2023 11:30:35 GMT (996kb,D)
[v5] Thu, 25 Apr 2024 11:29:54 GMT (997kb,D)
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