Interplay of thermal and quantum spin fluctuations in the kagome lattice compound herbertsmithite
Interplay of thermal and quantum spin fluctuations in the kagome lattice compound herbertsmithite
复制标题
DOI：
10.1103/physrevb.82.144412
复制
发表时间：
2010-05
影响因子：
3.7
通讯作者：
D. Wulferding;P. Lemmens;P. Scheib;J. Roeder;P. Mendels;M. Vries;S. Chu;T. Han;Young S. Lee
中科院分区：
文献类型：
--
作者：
D. Wulferding;P. Lemmens;P. Scheib;J. Roeder;P. Mendels;M. Vries;S. Chu;T. Han;Young S. Lee
我们提出了一个拉曼光谱研究的Herbertsmithite ZnCu 3（OH）6Cl 2，第一次实现了海森堡s=1/2反铁磁体上的一个完美的kagome晶格。该化合物的磁激发谱主要由两个组成部分，高温准弹性信号和低温，宽的最大值。后者有一个线性的低能量斜率，并延伸到高能量。我们研究了这两种信号的温度依赖性和对称性。我们的数据与以前的计算一致，并指向自旋液体基态。
We present a Raman spectroscopic investigation of the Herbertsmithite ZnCu3(OH)6Cl2, the first realization of a Heisenberg s=1/2 antiferromagnet on a perfect kagome lattice. The magnetic excitation spectrum of this compound is dominated by two components, a high temperature quasi elastic signal and a low temperature, broad maximum. The latter has a linear low energy slope and extends to high energy. We have investigated the temperature dependence and symmetry properties of both signals. Our data agree with previous calculations and point to a spin liquid ground state.