Anomalous Enhancement of the Superconducting Transition Temperature in Electron-Doped Cuprate Heterostructures

Details Anomalous Enhancement of the Superconducting Transition Temperature in Electron-Doped Cuprate Heterostructures Anomalous Enhancement of the Superconducting Transition Temperature in Electron-Doped Cuprate Heterostructures

2011-02-03

arxiv.org/abs/1102.0727v1

Physical Review B 83, 060511(R) (2011)

Physics

Condensed Matter

Superconductivity

4 figures. To appear in PRB as a Rapid Communication

Scientific paper

The superconducting transition temperature $T_{c}$ of multilayers of electron-doped cuprates, composed of underdoped (or undoped) and overdoped La% $_{2-x}$Ce$_{x}$CuO$_{4}$ (LCCO) and Pr$_{2-x}$Ce$_{x}$CuO$_{4}$ (PCCO) thin films, is found to increase significantly with respect to the $T_{c}$ of the corresponding single-phase films. By investigating the critical current density of superlattices with different doping levels and layer thicknesses, we find that the $T_{c}$ enhancement is caused by a redistribution of charge over an anomalously large distance.

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