Cu-spin Correlation in the Electron-overdoped High-Tc Cuprate Thin Films of La_2-x_Ce_x_CuO_4_ Probed by Low-energy Muons

S. E. Park; Y. Kawai; A. Suter; H. Okabe; J. G. Nakamura; H. Kuwahara; Z. Salman; T. Prokscha; R. Kadono; T. Adachi

doi:10.7566/jpsj.94.124710

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arXiv · 2511.00426

Cu-spin Correlation in the Electron-overdoped High-Tc Cuprate Thin Films of La_2-x_Ce_x_CuO_4_ Probed by Low-energy Muons

S. E. Park·Y. Kawai·A. Suter·H. Okabe·J. G. Nakamura·H. Kuwahara·Z. Salman·T. Prokscha·R. Kadono·T. Adachi

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Abstract

We investigated the Cu-spin correlation in the overdoped regime of the electron-doped high-Tc cuprate thin films of La_2-x_Ce_x_CuO_4_, 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 La$_2-x_Ce_x_CuO_4_ with x~0.18.

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S. E. Park, Y. Kawai, A. Suter, H. Okabe, J. G. Nakamura, H. Kuwahara, Z. Salman, T. Prokscha, R. Kadono, T. Adachi. 2025-11-01. Cu-spin Correlation in the Electron-overdoped High-Tc Cuprate Thin Films of La_2-x_Ce_x_CuO_4_ Probed by Low-energy Muons. https://doi.org/10.7566/jpsj.94.124710

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