Field-induced electronic phase separation in the high-temperature superconductor La\(_{1.94}\)Sr\(_{0.06}\)CuO\(_{4+y}\)

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...

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Published inarXiv.org
Main Authors Holm-Dahlin, S, Larsen, J, Jacobsen, H, Rømer, A T, A -E Ţuţueanu, Ahmad, M, J -C Grivel, Scheuermann, R, Zimmermann, M v, Boehm, M, Steffens, P, Niedermayer, Ch, Pedersen, K S, Christensen, N B, Wells, B O, Lefmann, K, Udby, L
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 25.04.2024
Subjects
Antiferromagnetism
High temperature superconductors
Magnetic moments
Magnetism
Muon spin rotation
Neutron diffraction
Neutrons
Phase separation
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Summary: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.
ISSN:2331-8422