Zeeman-Perturbed ^<63>Cu Nuclear Quadrupole Resonance Study of Vortex State of YBa_2Cu_3O_<7-δ>(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We report a ^<63>Cu nuclear quadrupole resonance (NQR) study of the vortex state for an aligned polycrystalline sample of a slightly overdoped high-T_c superconductor YBa_2Cu_3O_<7-δ>(T_c〜92K) at a low magnetic field of 96 mT along the c axis, near a lower critical field H_<c1>. We observed the frequency distribution of the nuclear spin-lattice relaxation time ^<63>T_1 in a Zeeman-perturbed ^<63>Cu NQR spectrum below T_c. The characteristic behavior of 1/^<63>T_1 with respect to temperature and frequency suggests the role of antiferromagnetic spin fluctuations in the Doppler-shifted quasiparticle energy spectrum inside and outside vortex cores.
- 社団法人日本物理学会の論文
- 2006-01-15
著者
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UEDA Yutaka
Institute for Solid State Physics, University of Tokyo
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YOSHIMURA Kazuyoshi
Department of Chemistry, Graduate School of Science, Kyoto University
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Ueda Yutaka
Institute For Solid State Physics University Of Tokyo
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Yoshimura Kazuyoshi
Department Of Applied Science Tokyo Electrical Engineering College
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ITOH Yutaka
Department of Chemistry, Graduate School of Science, Kyoto University
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MICHIOKA Chishiro
Department of Chemistry, Graduate School of Science, Kyoto University
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Itoh Yutaka
Department Of Chemistry Graduate School Of Science Kyoto University
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Michioka Chishiro
Department Of Chemistry Graduate School Of Science Kyoto University
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Michioka C
Department Of Chemistry Graduate School Of Science Kyoto University
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Ueda Yutaka
Institute For Solid State Physic The University Of Tokyo
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