Anomalous enhancement of the superconducting transition temperature of electron-doped La2-xCexCuO4 and Pr2-xCexCuO4 cuprate heterostructures

作者：Jin K^*; Bach P; Zhang X H; Grupel U; Zohar E; Diamant I; Dagan Y; Smadici S; Abbamonte P; Greene R L

来源：Physical Review B, 2011, 83(6): 060511.

DOI：10.1103/PhysRevB.83.060511

The superconducting transition temperature T-c of multilayers of electron-doped cuprates, composed of underdoped (or undoped) and overdoped La2-xCexCuO4 (LCCO) and Pr2-xCexCuO4 (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.

• 出版日期2011-2-28