基于团簇的掺铒钆钒酸盐光谱模型
A Cluster-Based Model of the Spectrum of Erbium-Doped GdVO$_4$
AI总结：
研究掺铒钆钒酸盐光谱，提出基于团簇模型，其拟合参数少且物理起源清晰，与实验光谱相符，有助于预测未来实验中微波到光的转换。
AI中文摘要：
稀土离子掺杂到反铁磁晶体中的实验观察显示光谱丰富。本文提出基于团簇的模型描述掺铒钆钒酸盐（Er:GdVO₄）主体晶体，其中铒离子直接与其四个最近邻钆离子耦合，后者再与晶体其余部分的平均场耦合。与文献中先前模型相比，该模型拟合参数数量更少且物理起源更清晰。与Er:GdVO₄实验观测光谱相符，表明该模型成功捕捉系统最重要相互作用，对未来实验预测微波到光的转换可能有用。
英文摘要：
Experimental observations of rare-earth ions doped into an antiferromagnetic crystal show an enriched optical spectrum. In this paper we present a cluster-based model to describe erbium ions doped into a gadolinium vanadate (Er:GdVO$_4$) host crystal, wherein the erbium ion couples directly to its four nearest neighbour gadolinium ions, which in turn couple to the mean field of the rest of the crystal. Compared to previous models in the literature, the parameters used to fit this model are fewer in number, with clearer physical origins. Agreement with the experimentally observed optical spectrum of Er:GdVO$_4$ suggests that our model succeeds in capturing the most important interactions of the system, suggesting that it may be useful for predicting microwave-to-optical transduction in future experiments.
