17O NMR study of the intrinsic magnetic susceptibility and spin dynamics of the quantum kagome antiferromagnet ZnCu3(OH)6Cl2

被引：236

作者：

Olariu, A. ^{[1
]}

Mendels, P. ^{[1
]}

Bert, F. ^{[1
]}

Duc, F.

Trombe, J. C. ^{[2
]}

de Vries, M. A. ^{[3
,4
]}

Harrison, A. ^{[4
,5
]}

机构：

[1] Univ Paris 11, Phys Solides Lab, CNRS, UMR 8502, F-91405 Orsay, France

[2] CNRS, Ctr Elaborat Mat & Etud Struct, UPR 8011, F-31055 Toulouse, France

[3] Univ Edinburgh, Sch Chem, Edinburgh EH9 EJZ, Midlothian, Scotland

[4] Univ Edinburgh, CSEC, Edinburgh EH9 EJZ, Midlothian, Scotland

[5] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.100.087202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report, through O-17 NMR, an unambiguous local determination of the intrinsic kagome lattice spin susceptibility as well as that created around nonmagnetic defects arising from natural Zn/Cu exchange in the S=1/2 (Cu2+) herbertsmithite ZnCu3(OH)(6)Cl-2 compound. The issue of a singlet-triplet gap is addressed. The magnetic response around a defect is found to markedly differ from that observed in nonfrustrated antiferromagnets. Finally, we discuss our relaxation measurements in the light of Cu and Cl NMR data and suggest a flat q dependence of the excitations.

引用

页数：4

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