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

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

2005-01-06

arxiv.org/abs/cond-mat/0501120v1

Physics

Condensed Matter

Superconductivity

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

Scientific paper

10.1103/PhysRevB.71.100502

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.

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