Electronically competing phases and their magnetic field dependence in electron-doped nonsuperconducting and superconducting Pr0.88LaCe0.12CuO4

Abstract

We present comprehensive neutron scattering studies of nonsuperconducting and superconducting electron-doped Pr0.88LaCe0.12CuO4(PLCCO). At zero field, the transition from antiferromagnetic (AF) as-grown PLCCO to superconductivity without static antiferromagnetism can be achieved by annealing the sample in pure Ar at different temperatures, which also induces an epitaxial (Pr,La,Ce)2O3 phase as an impurity. When the superconductivity first appears in PLCCO, a quasi-two-dimensional (2D) spin-density-wave (SDW) order is also induced, and both coexist with the residual three-dimensional (3D) AF state. A magnetic field applied along the [-1,1,0] direction parallel to the CuO2 plane induces a ``spin-flop'' transition, where the noncollinear AF spin structure of PLCCO is transformed into a collinear one. The spin-flop transition is continuous in semiconducting PLCCO, but gradually becomes sharp with increasing doping and the appearance of superconductivity. A c-axis aligned magnetic field that suppresses the superconductivity also enhances the quasi-2D SDW order at (0.5,0.5,0) for underdoped PLCCO. However, there is no effect on the 3D AF order in either superconducting or nonsuperconducting samples. Since the same field along the [-1,1,0] direction in the CuO2 plane has no (or little) effect on the superconductivity, (0.5,0.5,0) and (Pr,La,Ce)2O3 impurity positions, we conclude that the c-axis field-induced effect is intrinsic to PLCCO and arises from the suppression of superconductivity.

17 pages, 21 figures

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Cited by in corpus (31)

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• Muon spin rotation studies of electronic excitations and magnetism in the vortex cores of superconductors
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• High Energy Spin Excitations in Electron-Doped Superconducting Pr${}_{0.88}$LaCe${}_{0.12}$CuO${}_{4-\delta }$ with $T_c=21$ K
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• Evolution of the low energy spin dynamics in electron-doped high-transition temperature superconductor Pr0.88LaCe0.12CuO4-d
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• Anisotropy of the in-plane angular magnetoresistance of electron-doed Sr1-xLaxCuO2 thin films
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• Nernst effect in the electron-doped cuprates
• Quantum spin correlations through the superconducting-normal phase transition in electron-doped superconducting Pr0.88LaCe0.12CuO4-d
• Experimental evidence for Zeeman spin-orbit coupling in layered antiferromagnetic conductors
• Doping evolution of antiferromagnetism and transport properties in the non-superconducting BaFe2-2xNixCrxAs2
• Gap function symmetry and spin dynamics in electron-doped cuprate superconductor
• Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4
• Unconventional Low-Energy Excitations of Cuprate Superconductors
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• Slow spin-glass and fast spin-liquid components in quasi-two-dimensional La2(Cu,Li)O4
• Field-Induced Uniform Antiferromagnetic Order Associated with Superconductivity in Pr${}_{1-x}$LaCe${}_x$CuO${}_{4-\delta }$
• High-field muSR studies of superconducting and magnetic correlations in cuprates above Tc
• Texture-induced spin-orbit coupling and Skyrmion-electron bound states in a Néel antiferromagnet
• Impurity resonance states in electron-doped high T_c superconductors
• Muon spin relaxation study of the spin correlation in the overdoped regime of electron-doped high-Tc cuprate superconductors
• Electron states, bound to a texture in a Néel antiferromagnet
• Coexistence of the antiferromagnetic and superconducting order and its effect on spin dynamics in electron-doped high-$T_c$ cuprates