TRIUMF

Exp. No.

M1740 — Approved

Title of Experiment

Microscopic investigations of magnetic properties of electron-doped high-Tc cuprate superconductor Pr1.3-xLa0.7CexCuO4 (x = 0.1) under uniaxial pressure

Spokesperson(s) for Group

Safety Coordinator(s) for Group

Current Members of Group

Name Institution Status % of research time devoted to experiment
S.C. Cheung Columbia University Student (PhD)
Z. Guguchia Columbia University Research Scientist
G.M. Luke McMaster University Professor
D. Tam Rice University Student (PhD)
Y.J. Uemura Columbia University Professor
T. Adachi Sophia University Associate Professor
J. Beare McMaster University Student (PhD)
Y. Cai McMaster University Student (PhD)
P. Dai Rice University Professor
B. Frandsen University of California, Berkeley Research Scientist
J. Gong Columbia University Research Scientist
A.M. Hallas McMaster University Student (PhD)
Y. Koike Tohoku University Professor
T. Munsie McMaster University Student (PhD)
M.N. Wilson McMaster University Student (PhD)

Abstract

High-Tc superconductivity shows up when either holes or electrons are doped to parent Mott-insulating cuprates. Understanding the similarities and differences between the hole- and electron-doped cuprates would be crucial for elucidating the fundamental nature of these materials. Of particular interest is the origin of the AF order and it’s relation to superconductivity in electron-doped cuprates, where only limited number of comprehensive studies on this issue exist. Recent µSR experiments revealed that in the reduced superconducting T’- Pr1.3-xLa0.7CexCuO4 (x = 0.1) system short range magnetic order (SRMO) develops, implying that the reduction annealing gives rise to the change of the long-range AF order to a SRMO. An important question is whether this short range magnetic order is a weak remains of the antiferromagnetic phase, or it is an intrinsic part of the phase diagram and is controlled by the Fermi surface properties. In order to understand the nature of this SRMO and its relation to superconductivity in SC T’-Pr1.3-xLa0.7CexCuO4+δ we propose µSR experiments under uniaxial pressure, which is shown to have strong effect on Tc.