Cu-63(2) nuclear quadrupole and nuclear magnetic resonance studies of YBa2Cu4O8 in the normal and superconducting states

被引：44

作者：

Corey, RL

Curro, NJ

OHara, K

Imai, T

Slichter, CP

Yoshimura, K

Katoh, M

Kosuge, K

机构：

[1] UNIV ILLINOIS,DEPT CHEM,URBANA,IL 61801

[2] UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801

[3] UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801

[4] KYOTO UNIV,FAC SCI,DEPT CHEM,KYOTO 606,JAPAN

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.53.5907

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report nuclear quadrupole resonance (NQR) and nuclear magnetic resonance (NMR) measurements of the spin lattice and Gaussian spin-spin relaxation limes, T-1 and T-2G, respectively, in an unaligned (NQR) and aligned (NMR) powder of YBa2Cu4O8 Experimental details, critical for accurate NQR measurements in this system, are discussed. The normal-state data are analyzed using several models. Evidence for the existence of a spin gap is presented. The normal-state data agree well with an analysis using scaling theory predictions for z=1 quantum critical and quantum disordered regimes. The superconducting state data agree with recent calculations for d-wave superconductivity.

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页码：5907 / 5914

页数：8

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