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arXiv · 2209.08613

Controlling frustrated magnetism on the kagome lattice by uniaxial-strain tuning

Jierong Wang·Y. -S. Su·M. Spitaler·P. Puphal·C. Krellner·S. E. Brown·A. Pustogow
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Abstract

It is predicted that strongly interacting spins on a frustrated lattice may lead to a quantum disordered ground state or even form a quantum spin liquid with exotic low-energy excitations. However, a thorough tuning of the frustration strength, separating its effects from those of disorder and other factors, is pending. Here we break the symmetry of a kagome-lattice compound in a controlled manner by applying $in$ $situ$ uniaxial stress. The transition temperature of $\rm Y_3Cu_9(OH)_{18}OCl_8$ is linearly enhanced with strain, $\Delta T_{\rm N}/T_{\rm N} \approx 10\%$ upon in-plane compression of order $1\%$, providing clear evidence for a release of frustration and its pivotal role for magnetic order. Our comprehensive $^1$H NMR results suggest a $\overrightarrow{Q}=(1/3\times 1/3)$ state under unstrained conditions and further reveal an incomplete antiferromagnetic transition with fluctuating moments in this strongly frustrated system.

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Jierong Wang, Y. -S. Su, M. Spitaler, P. Puphal, C. Krellner, S. E. Brown, A. Pustogow. 2022-09-18. Controlling frustrated magnetism on the kagome lattice by uniaxial-strain tuning. https://doi.org/10.1103/physrevlett.131.256501

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