Low-energy spin fluctuations in the ground states of electron-doped PrLaCeCuO cuprate superconductors

Fujita, Masaki*; Matsuda, Masaaki; Lee, S.-H.*; Nakagawa, Masaaki*; Yamada, Kazuyoshi*

Physical Review Letters, 101(10), p.107003_1 - 107003_4, 2008/09

https://doi.org/10.1103/PhysRevLett.101.107003

Low-energy spin fluctuations have been investigated in the electron-doped PrLaCeCuO over a wide concentration range of 0.070.18, spanning from the antiferromagnetic phase to the heavily overdoped superconducting (SC) phase. The low-energy excitations exhibit commensurate peaks centered at the (, ) position for all . Our data show that the characteristics of the excitations, such as the relaxation rate and the spin stiffness, decrease with increasing in the SC phase and disappear with the disappearance of superconductivity.