Pressure tuning of structure, superconductivity and novel magnetic order in the Ce-underdoped electron-doped cuprate T'-Pr_1.3-xLa_0.7Ce_xCuO_4 (x = 0.1)

Z. Guguchia; T. Adachi; Z. Shermadini; T. Ohgi; J. Chang; E. Bozin; F. von Rohr; A. M. dos Santos; J. J. Molaison; R. Boehler; Y. Koike; A. R. Wieteska; B. A. Frandsen; E. Morenzoni; A. Amato; S. J. L. Billinge; Y. J. Uemura; R. Khasanov

doi:10.1103/physrevb.96.094515

arXiv · 1704.07033

Pressure tuning of structure, superconductivity and novel magnetic order in the Ce-underdoped electron-doped cuprate T'-Pr_1.3-xLa_0.7Ce_xCuO_4 (x = 0.1)

Z. Guguchia·T. Adachi·Z. Shermadini·T. Ohgi·J. Chang·E. Bozin·F. von Rohr·A. M. dos Santos·J. J. Molaison·R. Boehler·Y. Koike·A. R. Wieteska·B. A. Frandsen·E. Morenzoni·A. Amato·S. J. L. Billinge·Y. J. Uemura·R. Khasanov

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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 T'-Pr_1.3-xLa_0.7Ce_xCuO_4 with x = 0.1 are reported. A strong reduction of the lattice constants a and c is observed under pressure. However, no indication of any pressure induced phase transition from T' to T structure is observed up to the maximum applied pressure of p = 11 GPa. Large and non-linear increase of the short-range magnetic order temperature T_so in T'-Pr_1.3-xLa_0.7Ce_xCuO_4 (x = 0.1) was observed under pressure. Simultaneously pressure causes a non-linear decrease of the SC transition temperature T_c. All these experiments establish the short-range magnetic order as an intrinsic and a new competing phase in SC T'-Pr_1.2La_0.7Ce_0.1CuO_4. 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.

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Z. Guguchia, T. Adachi, Z. Shermadini, T. Ohgi, J. Chang, E. Bozin, F. von Rohr, A. M. dos Santos, J. J. Molaison, R. Boehler, Y. Koike, A. R. Wieteska, B. A. Frandsen, E. Morenzoni, A. Amato, S. J. L. Billinge, Y. J. Uemura, R. Khasanov. 2017-04-24. Pressure tuning of structure, superconductivity and novel magnetic order in the Ce-underdoped electron-doped cuprate T'-Pr_1.3-xLa_0.7Ce_xCuO_4 (x = 0.1). https://doi.org/10.1103/physrevb.96.094515

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