Pulsed neutron-scattering study of an entire spin excitations in the electron-doped high-Tc superconductor

Masaki Fujita; Masaaki Matsuda; C. D. Frost; B. Fåk; Kazuyoshi Yamada

doi:10.1016/j.physc.2007.03.279

Pulsed neutron-scattering study of an entire spin excitations in the electron-doped high-T_c superconductor

Masaki Fujita, Masaaki Matsuda, C. D. Frost, B. Fåk, Kazuyoshi Yamada

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Abstract

We have investigated magnetic excitations of an electron-doped superconductor Pr_0.89LaCe_0.11CuO₄ (T_c = 26 K) using pulsed neutron-scattering over a wide range of energy up to ∼180 meV. Spin fluctuations were found to persist around (π, π) reciprocal position at least up to ∼180 meV. With increasing the energy (ω) below 60 meV, peak-width broadens rapidly, while above this energy the width weakly depends on the energy. On the other hand, the scattering intensity shows a gradual decrease as the ω increase. However, no well-defined magnetic intensity was observed, where the peak-width saturates. The observed spin excitations in Pr_0.89LaCe_0.11CuO₄ is compared with those in the hole-doped system from the viewpoint of dual structure of the spectrum.

Original language	English
Pages (from-to)	44-47
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	460-462 I
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2007.03.279
State	Published - Sep 1 2007
Externally published	Yes

Funding

A part of present work was performed under the UK–Japan Collaboration Program on Neutron Scattering and supported by Grant-In-Aid for Young Scientists A (17684016) and for Scientific Research, Creative Scientific Research, from Ministry of Education, Culture, Sports, Science and Technology.

Funders	Funder number
Ministry of Education, Culture, Sports, Science and Technology

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10.1016/j.physc.2007.03.279

Cite this

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title = "Pulsed neutron-scattering study of an entire spin excitations in the electron-doped high-Tc superconductor",

abstract = "We have investigated magnetic excitations of an electron-doped superconductor Pr0.89LaCe0.11CuO4 (Tc = 26 K) using pulsed neutron-scattering over a wide range of energy up to ∼180 meV. Spin fluctuations were found to persist around (π, π) reciprocal position at least up to ∼180 meV. With increasing the energy (ω) below 60 meV, peak-width broadens rapidly, while above this energy the width weakly depends on the energy. On the other hand, the scattering intensity shows a gradual decrease as the ω increase. However, no well-defined magnetic intensity was observed, where the peak-width saturates. The observed spin excitations in Pr0.89LaCe0.11CuO4 is compared with those in the hole-doped system from the viewpoint of dual structure of the spectrum.",

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AU - Fujita, Masaki

AU - Matsuda, Masaaki

AU - Frost, C. D.

AU - Fåk, B.

AU - Yamada, Kazuyoshi

PY - 2007/9/1

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N2 - We have investigated magnetic excitations of an electron-doped superconductor Pr0.89LaCe0.11CuO4 (Tc = 26 K) using pulsed neutron-scattering over a wide range of energy up to ∼180 meV. Spin fluctuations were found to persist around (π, π) reciprocal position at least up to ∼180 meV. With increasing the energy (ω) below 60 meV, peak-width broadens rapidly, while above this energy the width weakly depends on the energy. On the other hand, the scattering intensity shows a gradual decrease as the ω increase. However, no well-defined magnetic intensity was observed, where the peak-width saturates. The observed spin excitations in Pr0.89LaCe0.11CuO4 is compared with those in the hole-doped system from the viewpoint of dual structure of the spectrum.

AB - We have investigated magnetic excitations of an electron-doped superconductor Pr0.89LaCe0.11CuO4 (Tc = 26 K) using pulsed neutron-scattering over a wide range of energy up to ∼180 meV. Spin fluctuations were found to persist around (π, π) reciprocal position at least up to ∼180 meV. With increasing the energy (ω) below 60 meV, peak-width broadens rapidly, while above this energy the width weakly depends on the energy. On the other hand, the scattering intensity shows a gradual decrease as the ω increase. However, no well-defined magnetic intensity was observed, where the peak-width saturates. The observed spin excitations in Pr0.89LaCe0.11CuO4 is compared with those in the hole-doped system from the viewpoint of dual structure of the spectrum.

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Pulsed neutron-scattering study of an entire spin excitations in the electron-doped high-T_c superconductor

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