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 (the so-called ) structure with 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 to the (the so-called T) structure is observed up to the maximum applied pressure of = 11 GPa. Large and nonlinear increase of the short-range magnetic order temperature in () was observed under pressure. Simultaneous pressure causes a nonlinear decrease of the SC transition temperature . All these experiments establish the short-range magnetic order as an intrinsic and competing phase in SC (). 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.
4 More- Received 6 October 2016
- Revised 10 August 2017
DOI:https://doi.org/10.1103/PhysRevB.96.094515
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