Abstract
High-pressure neutron powder diffraction, muon-spin rotation, and magnetization studies of the structural, magnetic, and the superconducting properties of the Ce-underdoped superconducting (SC) electron-doped cuprate system with the Nd2CuO4 (the so-called T′) structure T′-Pr1.3-xLa0.7CexCuO4 with x=0.1 are reported. A strong reduction of the in-plane and out-of-plane lattice constants is observed under pressure. However, no indication of any pressure-induced phase transition from T′ to the K2NiF4 (the so-called T) structure is observed up to the maximum applied pressure of p = 11 GPa. Large and nonlinear increase of the short-range magnetic order temperature Tso in T′-Pr1.3-xLa0.7CexCuO4 (x=0.1) was observed under pressure. Simultaneous pressure causes a nonlinear decrease of the SC transition temperature Tc. All these experiments establish the short-range magnetic order as an intrinsic and competing phase in SC T′-Pr1.3-xLa0.7CexCuO4 (x=0.1). The observed pressure effects may be interpreted in terms of the improved nesting conditions through the reduction of the in-plane and out-of-plane lattice constants upon hydrostatic pressure.
Original language | English |
---|---|
Article number | 094515 |
Journal | Physical Review B |
Volume | 96 |
Issue number | 9 |
DOIs | |
State | Published - Sep 14 2017 |
Funding
The experiments were carried out at the Swiss Muon Source () Paul Scherrer Insitute, Villigen, Switzerland. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Z.G. gratefully acknowledges the financial support by the Swiss National Science Foundation (Early Postdoc Mobility SNFfellowship P2ZHP2-161980). Work at the Department of Physics of Columbia University is supported by US NSF DMR-1436095 (DMREF) and NSF DMR-1610633 as well as the REIMEI project of Japan Atomic Energy Agency. Work at Brookhaven National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences (DOE-BES) under Contract No. DE-SC00112704. Z.G. thanks H. Keller, A. Shengelaya, H. Luetkens, A. N. Pasupathy, and R. M. Fernandes for useful discussions. J.C. gratefully acknowledges financial support by the Swiss National Science Foundation. T.A. and Y.K. acknowledge support from JSPS KAKENHI Grant No. 23540399 and by MEXT KAKENHI Grant No. 23108004.