Quenched Magnon excitations by oxygen sublattice reconstruction in (SrCuO2)n/(SrTiO3)2 superlattices.
The recently discovered structural reconstruction in the cuprate superlattice (SrCuO2)n/(SrTiO3)2 has been investigated across the critical value of n = 5 using resonant inelastic x-ray scattering (RIXS). We find that at the critical value of n, the cuprate layer remains largely in the bulk-like two-dimensional structure with a minority of Cu plaquettes being reconstructed. The partial reconstruction leads to quenching of the magnons starting at the Γ-point due to the minority plaquettes acting as scattering points. Although comparable in relative abundance, the doped charge impurities in electron-doped cuprate superconductors do not show this quenching of magnetic excitations.
Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
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M
Dantz
Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
J
J
Pelliciari
MESA+ Institute for Nanotechnology, University of Twente, Post Office Box 217, 7500AE Enschede, The Netherlands.
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D
Samal
Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
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V
Bisogni
Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
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Y
Huang
Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
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P
Olalde-Velasco
Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
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VN
Strocov
MESA+ Institute for Nanotechnology, University of Twente, Post Office Box 217, 7500AE Enschede, The Netherlands.
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G
Koster
Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
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T
Schmitt