Ji Xiaoyu, Zhou Xuebo, Zhu Shilin, Ma Fengcai, Li Gang, Wu Wei
Department of Physics, Liaoning University, Shenyang 110036, China.
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Materials (Basel). 2025 Aug 29;18(17):4044. doi: 10.3390/ma18174044.
RuSn crystallizes in the cubic IrGe-type structure (space group ), a class of intermetallic compounds. Previous studies focused primarily on its crystal structure, band calculations, and basic transport properties. Here, we report a systematic investigation of high-quality single crystals via electrical resistivity, Hall effect, specific heat, and thermal transport measurements. The TX intermetallic family-with its diverse electronic ground states-provides an ideal platform for exploring such topology-property relationships. RuSn exhibits metallic behavior, with consistent Hall effect and Seebeck coefficient data indicating a compensated electron-hole two-band system. Temperature-dependent modulation of electronic states near the Fermi surface alters charge carrier transport, which may imply the presence of a Lifshitz transition in RuSn. More importantly, magnetic quantum oscillations are observed for the first time, confirming the presence of two Dirac points in its band structure.
RuSn以立方IrGe型结构（空间群 ）结晶，属于一类金属间化合物。先前的研究主要集中在其晶体结构、能带计算和基本输运性质上。在此，我们通过电阻率、霍尔效应、比热和热输运测量对高质量单晶进行了系统研究。具有多种电子基态的TX金属间化合物家族为探索这种拓扑-性质关系提供了理想平台。RuSn表现出金属行为，一致的霍尔效应和塞贝克系数数据表明存在补偿的电子-空穴双能带系统。费米面附近电子态的温度依赖性调制改变了载流子输运，这可能意味着RuSn中存在里夫希茨转变。更重要的是，首次观察到磁量子振荡，证实其能带结构中存在两个狄拉克点。
