Interplay of thermal and quantum spin fluctuations on the kagome lattice

Details Interplay of thermal and quantum spin fluctuations on the kagome lattice Interplay of thermal and quantum spin fluctuations on the kagome lattice

2010-05-26

arxiv.org/abs/1005.4831v2

Phys. Rev. B 82, 144412 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

5 figures

Scientific paper

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.

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