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arXiv · 2511.09860

Quantum fluctuations associated with first-order magnetic transition in a frustrated kagome lattice antiferromagnet

Zhongchen Xu·Xinyang Liu·Cuiwei Zhang·Shuai Zhang·Feng Jin·Junsen Xiang·Quansheng Wu·Xianmin Zhang·Peijie Sun·Youguo Shi
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Abstract

Intense quantum fluctuations arising from geometrical frustrations in kagome-lattice magnets provide a feasible approach to exotic quantum states. Here, we document an unexpected isosymmetric first-order magnetic transition in the recently synthesized frustrated kagome-lattice antiferromagnet Nd3ScBi5, which is characterized by significant latent heat and a pronounced magnetocaloric effect, as well as discontinuous Raman shifts and negligible hysteresis. Employing the magnetocaloric effect as a detection method, in conjunction with systematical field-dependent physical properties, we uncover a distinctive 1/2 magnetization plateau phase with significant quantum fluctuations. Our study unveils Nd3ScBi5 as a prototypical model with an emerging phase of enhanced quantum fluctuations triggered by first-order magnetic transitions.

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Zhongchen Xu, Xinyang Liu, Cuiwei Zhang, Shuai Zhang, Feng Jin, Junsen Xiang, Quansheng Wu, Xianmin Zhang, Peijie Sun, Youguo Shi. 2025-11-13. Quantum fluctuations associated with first-order magnetic transition in a frustrated kagome lattice antiferromagnet. https://arxiv.org/abs/2511.09860

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