Zeeman-perturbed 63Cu nuclear quadrupole resonance study of vortex state of YBa2Cu3O7-δ

被引：2

作者：

Itoh, Y ^{[1
]}

Michioka, C

Yoshimura, K

Ueda, Y

机构：

[1] Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 01期

关键词：

NOR; NMR; vortex core; high-T-c; superconductor; YBa2Cu2O7-delta;

D O I：

10.1143/JPSJ.75.013711

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a Cu-63 nuclear quadrupole resonance (NQR) study of the vortex state for all aligned polycrystalline sample of a slightly overdoped high-T-c superconductor YBa2Cu3O7-delta (T-c similar to 92 K) at a low magnetic field of 96 mT along the c axis, near a lower critical field H-cl. We observed the frequency distribution of the nuclear spin-lattice relaxation time T-63(1) in a Zeeman-perturbed Cu-63 NQR spectrum below T-c. The characteristic behavior of I/T-63(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.

引用

页数：4

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