Symmetry Reduction in the Quantum Kagome Antiferromagnet Herbertsmithite

被引：49

作者：

Zorko, A. ^{[1
]}

Herak, M. ^{[2
]}

Gomilsek, M. ^{[1
]}

van Tol, J. ^{[3
]}

Velazquez, M. ^{[4
]}

Khuntia, P. ^{[5
]}

Bert, F. ^{[5
]}

Mendels, P. ^{[5
]}

机构：

[1] Jozef Stefan Inst, Jamova C 39, SI-1000 Ljubljana, Slovenia

[2] Inst Phys, Bijenicka C 46, HR-10000 Zagreb, Croatia

[3] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[4] Univ Bordeaux, CNRS, ICMCB, UPR 9048, 87 Ave Dr A Schweitzer, F-33608 Pessac, France

[5] Univ Paris Sud, Univ Paris Saclay, CNRS, Lab Phys Solides, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 01期

关键词：

SPIN-PEIERLS TRANSITION; LIQUID GROUND-STATE; LATTICE; INHOMOGENEITY; FRUSTRATION; RESONANCE; ORDER;

D O I：

10.1103/PhysRevLett.118.017202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Employing complementary torque magnetometry and electron spin resonance on single crystals of herbertsmithite, the closest realization to date of a quantum kagome antiferromagnet featuring a spin-liquid ground state, we provide novel insight into different contributions to its magnetism. At low temperatures, two distinct types of defects with different magnetic couplings to the kagome spins are found. Surprisingly, their magnetic response contradicts the threefoldsymmetry of the ideal kagome lattice, suggesting the presence of a global structural distortion that may be related to the establishment of the spin-liquid ground state.

引用

页数：6

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