Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-05-21
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 3 figures, to appear in Physical Review Letters
Scientific paper
10.1103/PhysRevLett.102.107004
We use resonant soft x-ray scattering (RSXS) to quantify the hole distribution in a superlattice of insulating La2CuO4 (LCO) and overdoped La_{2-x}Sr_{x}CuO4 (LSCO). Despite its non-superconducting constituents, this structure is superconducting with T_{c}=38 K. We found that the conducting holes redistribute electronically from LSCO to the LCO layers. The LCO layers were found to be optimally doped, suggesting they are the main drivers of superconductivity. Our results demonstrate the utility of RSXS for separating electronic from structural effects at oxide interfaces.
Abbamonte Peter
Bozovic Ivan
Cavellin C. D.
Gozar A.
Lee James C. T.
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