Measurement of unique magnetic and superconducting phases in oxygen-doped high-temperature superconductors La2-xSrxCuO4+y

Linda Udby, Jacob Larsen, Niels Bech Christensen, M. Boehm, Ch Niedermayer, H. E. Mohottala, Thomas Bagger Stibius Jensen, Rasmus Toft-Petersen, F. C. Chou, Niels Hessel Andersen, Kim Lefmann, B. O. Wells

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Abstract

We present a combined magnetic neutron scattering and muon spin rotation study of the nature of the magnetic and superconducting phases in electronically phase separated La2-xSrxCuO4+y, x=0.04, 0.065, 0.09. For all samples, we find long-range modulated magnetic order below TN≃Tc=39 K. In sharp contrast to oxygen-stoichiometric La2-xSrxCuO4, we find that the magnetic propagation vector as well as the ordered magnetic moment is independent of Sr content and consistent with that of the “striped” cuprates. Our study provides direct proof that superoxygenation in La2-xSrxCuO4+y allows the spin stripe ordered phase to emerge and phase separate from superconducting regions with the hallmarks of optimally doped oxygen-stoichiometric La2-xSrxCuO4.
Original languageEnglish
JournalPhysical Review Letters
Volume111
Issue number22
Pages (from-to)227001
ISSN0031-9007
Publication statusPublished - 2013

Cite this

Udby, L., Larsen, J., Christensen, N. B., Boehm, M., Niedermayer, C., Mohottala, H. E., Jensen, T. B. S., Toft-Petersen, R., Chou, F. C., Andersen, N. H., Lefmann, K., & Wells, B. O. (2013). Measurement of unique magnetic and superconducting phases in oxygen-doped high-temperature superconductors La2-xSrxCuO4+y. Physical Review Letters, 111(22), 227001.