Evolution of the electronic state through the reduction annealing in electron-doped Pr1.3-xLa0.7CexCuO 4+δ (x = 0:10) single crystals: Antiferromagnetism, kondo effect, and superconductivity

Tadashi Adachi, Yosuke Mori, Akira Takahashi, Masatsune Kato, Terukazu Nishizaki, Takahiko Sasaki, Norio Kobayashi, Yoji Koike

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Abstract

The evolution of the electronic state through the reduction annealing has been investigated in electron-doped Pr1.3-xLa0.7Ce xCuO4+δ (x = 0:10) single crystals with the so-called T0 structure. From the ab-plane and c-axis electrical resistivity measurements in magnetic fields, it has been found that, through the reduction annealing, the strongly localized state of carriers accompanied by the antiferromagnetic (AF) pseudogap in the as-grown crystal changes to a metallic state bringing about the Kondo effect without AF pseudogap and to a superconducting state. These results are able to be understood in terms of a model based on the strong electron correlation. The complete removal of excess oxygen in the T0-cuprates is expected to result in the appearance of superconductivity in a wide range of the Ce concentration including the parent compound of x 1/4 0.

Original languageEnglish
Article number063713
Journaljournal of the physical society of japan
Volume82
Issue number6
DOIs
Publication statusPublished - 2013 Jun 1

Keywords

  • Electron-doped cuprate
  • Kondo effect
  • Reduction annealing
  • Superconductivity
  • T' structure

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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