Magnetism in the 2D Limit and Interface Superconductivity in Metal-Insulator La(2-x)Sr(x)CuO(4) Superlattices

Authors :: Suter, A.
Morenzoni, E.
Prokscha, T.
Wojek, B. M.
Luetkens, H.
Nieuwenhuys, G.
Gozar, A.
Logvenov, G.
Bozovic, I.
Source :: Physical Review Letters 106, 237003 (2011)
Publication Year :: 2011
Abstract: We show, by means of low-energy muon spin rotation measurements, that few-unit-cells thick La(2)CuO(4) layers synthesized digitally by molecular beam epitaxy synthesis are antiferromagnetically ordered. Below a thickness of about 5 CuO(2) layers the long-range ordered state breaks down, and a magnetic state appears with enhanced quantum fluctuations and a reduced spin stiffness. This magnetic state can exist in close proximity (few Angstrom) to high-temperature superconducting layers, without transmitting supercurrents.<br />Comment: 4 pages, 3 figures

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