Journal
PHYSICAL REVIEW LETTERS
Volume 101, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.107003
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Funding
- Japanese Ministry of Education, Culture, Sports, Science and Technology [10304026]
- U. S. DOE [DF-FG02-07ER45384]
- Grants-in-Aid for Scientific Research [10304026] Funding Source: KAKEN
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Low-energy spin fluctuations have been investigated in the electron-doped Pr(1-x)LaCe(x)CuO(4+delta) over a wide concentration range of 0.07 <= x <= 0.18, spanning from the antiferromagnetic phase to the heavily overdoped superconducting (SC) phase. The low-energy excitations exhibit commensurate peaks centered at the (pi, pi) position for all x. Our data show that the characteristics of the excitations, such as the relaxation rate and the spin stiffness, decrease with increasing x in the SC phase and disappear with the disappearance of superconductivity.
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