2025/11/01 by S. E. Park, Park, S. E., Yuma Kawai +17
Physics and Astronomy · Engineering · #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Muon and positron interactions and applications
paper · pdf · doi:10.48550/arxiv.2511.00426
We investigated the Cu-spin correlation in the overdoped regime of the electron-doped high-Tc cuprate thin films of La2-xCexCuO4_, changing the reduction condition from muon spin relaxation using low-energy muons. The Cu-spin correlation developed at low temperatures for optimally reduced films with x=0.13 as well as x=0.17 where the superconductivity was almost suppressed. These results are contrary to those observed in the hole-doped high-Tc cuprates where the development of the antiferromagnetic Cu-spin correlation disappears together with the suppression of superconductivity. The Cu-spin correlation developed at low temperatures in x=0.17 may be understood in terms of antiferromagnetism, but it may be related to a ferromagnetic order recently suggested in the nonsuperconducting heavily overdoped La2-xCexCuO4_ with x~0.18.