Suppression of Pseudogap Behavior and Antiferromagnetic Fluctuations by Electron Doping in T′-La1.8Eu0.2CuO4-yFyStudied by 63,65Cu NMR

Masaki Watai, Yongsun Lee, Hideto Fukazawa, Yoh Kohori, Toshiki Sunohara, Kota Shiosaka, Takayuki Kawamata, Yoji Koike

Research output: Contribution to journalArticlepeer-review

Abstract

We performed 63,65Cu NMR measurements of an electron-doped high-Tc cuprate superconductor T′-La1.8Eu0.2-CuO4-yFy (0 ≤ y ≤ 0.125) having Nd2CuO4-type structure (so-called T′-structure). Pseudogap behavior is observed in the lightly electron-doped region of y ≤ 0.075. The nuclear spin-lattice relaxation rate 1/T1 revealed that the antiferromagnetic spin fluctuations are suppressed by electron doping. These behaviors are like those reported in the optimum- and over-doped region of hole-doped high-Tc cuprate superconductors. It appears that electrons are more effectively doped through partial substitution in T′-La1.8Eu0.2CuO4-yFy than in isostructural T′-Pr1.7-xLa0.7CexCuO4.

Original languageEnglish
Article number023704
Journaljournal of the physical society of japan
Volume90
Issue number2
DOIs
Publication statusPublished - 2021 Feb 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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