Electronic inhomogeneity and competing phases in electron-doped superconducting Pr0.88LaCe0.12CuO4

Abstract

We use neutron scattering to demonstrate that electron-doped superconducting Pr0.88LaCe0.12CuO4 in the underdoped regime is electronically phase separated in the ground state, showing the coexistence of a superconducting phase with a three-dimensional antiferromagnetically ordered phase and a quasi-two-dimensional spin density wave modulation. The Neel temperature of both antiferromagnetic phases decreases linearly with increasing superconducting transition temperature (Tc) and vanishes when optimal superconductivity is achieved. These results indicate that the electron-doped copper oxides are close to a quantum critical point, where the delicate energetic balance between different competing states leads to microscopic heterogeneity.

arXiv comment14 pages, 4 figures, accepted to Phys. Rev. B as a rapid communication

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• Microscopic annealing process and its impact on superconductivity in T'-structure electron-doped copper oxides
• Pairing dynamics in strongly correlated superconductivity
• Phase separation and competition of superconductivity and magnetism in the two-dimensional Hubbard model: From strong to weak coupling
• Weak phase separation and the pseudogap in the electron-doped cuprates
• High Energy Spin Excitations in Electron-Doped Superconducting Pr${}_{0.88}$LaCe${}_{0.12}$CuO${}_{4-\delta }$ with $T_c=21$ K
• Electronically competing phases and their magnetic field dependence in electron-doped nonsuperconducting and superconducting Pr0.88LaCe0.12CuO4
• Evolution of the low energy spin dynamics in electron-doped high-transition temperature superconductor Pr0.88LaCe0.12CuO4-d
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• Gap function symmetry and spin dynamics in electron-doped cuprate superconductor
• Penetration depth of electron-doped-infinite-layer Sr${}_{0.88}$La${}_{0.12}$CuO${}_{2+x}$ thin films
• Low-temperature heat transport of Nd_{2-x}Ce_{x}CuO_{4} single crystals
• Non-resonant Raman response of inhomogeneous structures in the electron doped $t-t^{\prime }$ Hubbard model
• Distinct variation of electronic states due to annealing in La${}_{1.8}$Eu${}_{0.2}$CuO${}_4$ and Nd${}_2$CuO${}_4$
• On electron-hole symmetry and phase separation in some electron doped cuprates