Low-energy spin fluctuations in the ground states of electron-doped Pr1-xLaCexCuO4+δ cuprate superconductors

M. Fujita; M. Matsuda; S. H. Lee; M. Nakagawa; K. Yamada

doi:10.1103/PhysRevLett.101.107003

Low-energy spin fluctuations in the ground states of electron-doped Pr1-xLaCexCuO4+δ cuprate superconductors

M. Fujita, M. Matsuda, S. H. Lee, M. Nakagawa, K. Yamada

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Abstract

Low-energy spin fluctuations have been investigated in the electron-doped Pr1-xLaCexCuO4+δ 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 (π, π) 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.

Original language	English
Article number	107003
Journal	Physical Review Letters
Volume	101
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.101.107003
State	Published - Sep 5 2008
Externally published	Yes

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10.1103/PhysRevLett.101.107003

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abstract = "Low-energy spin fluctuations have been investigated in the electron-doped Pr1-xLaCexCuO4+δ 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 (π, π) 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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AU - Fujita, M.

AU - Matsuda, M.

AU - Lee, S. H.

AU - Nakagawa, M.

AU - Yamada, K.

PY - 2008/9/5

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N2 - Low-energy spin fluctuations have been investigated in the electron-doped Pr1-xLaCexCuO4+δ 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 (π, π) 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.

AB - Low-energy spin fluctuations have been investigated in the electron-doped Pr1-xLaCexCuO4+δ 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 (π, π) 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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Low-energy spin fluctuations in the ground states of electron-doped Pr1-xLaCexCuO4+δ cuprate superconductors

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