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

共 30 条

[11] Dirac structure, RVB, and Goldstone modes in the kagome antiferromagnet [J].

Hastings, MB .

PHYSICAL REVIEW B, 2001, 63 (01)

[12] Spin dynamics of the spin-1/2 Kagome lattice antiferromagnet ZnCu3(OH)6Cl2 [J].

Helton, J. S. ;

Matan, K. ;

Shores, M. P. ;

Nytko, E. A. ;

Bartlett, B. M. ;

Yoshida, Y. ;

Takano, Y. ;

Suslov, A. ;

Qiu, Y. ;

Chung, J. -H. ;

Nocera, D. G. ;

Lee, Y. S. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

[13]

IMAI T, IN PRESS PHYS REV LE

[14] Order versus disorder in the quantum Heisenberg antiferromagnet on the kagome lattice using exact spectra analysis [J].

Lecheminant, P ;

Bernu, B ;

Lhuillier, C ;

Pierre, L ;

Sindzingre, P .

PHYSICAL REVIEW B, 1997, 56 (05) :2521-2529

[15] Quantum-spin-liquid states in the two-dimensional kagome antiferromagnets ZnxCu4-x(OD)6Cl2 [J].

Lee, S.-H. ;

Kikuchi, H. ;

Qiu, Y. ;

Lake, B. ;

Huang, Q. ;

Habicht, K. ;

Kiefer, K. .

NATURE MATERIALS, 2007, 6 (11) :853-857

[16] Quantum magnetism in the paratacamite family: Towards an ideal kagome lattice [J].

Mendels, P. ;

Bert, F. ;

de Vries, M. A. ;

Olariu, A. ;

Harrison, A. ;

Duc, F. ;

Trombe, J. C. ;

Lord, J. S. ;

Amato, A. ;

Baines, C. .

PHYSICAL REVIEW LETTERS, 2007, 98 (07)

[17] Ga NMR study of the local susceptibility in kagome-based SrCr8Ga4O19:: Pseudogap and paramagnetic defects [J].

Mendels, P ;

Keren, A ;

Limot, L ;

Mekata, M ;

Collin, G ;

Horvatic, M .

PHYSICAL REVIEW LETTERS, 2000, 85 (16) :3496-3499

[18] Low-energy sector of the S=1/2 Kagome antiferromagnet [J].

Mila, F .

PHYSICAL REVIEW LETTERS, 1998, 81 (11) :2356-2359

[19]

Misguich G, 2007, EUR PHYS J B, V59, P305, DOI 10.1140/epjb/e2007-00301-6

[20]

MISGUICH G, ARXIVCONDMAT0310405

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