AI 中文总结
本研究通过量子振荡测量发现，高磁场下重费米子YbNi4P2的准粒子质量随场增大而降低，17 T处的Lifshitz跃迁伴随量子振荡频率突变，为相关理论模型提供实验依据。
AI 中文摘要
我们利用量子振荡测量研究了重费米子化合物YbNi4P2在高磁场下的费米面拓扑结构与准粒子性质。观测到随磁场增大，准粒子质量大幅降低，且与单离子近藤模型呈现良好的定性吻合。在17 T的推测Lifshitz跃迁处，观测到量子振荡频率发生突变，表明电子结构和/或准粒子特性出现 abrupt 变化。研究结果证明了调控电子结构的可行性，并为YbNi4P2及高磁场下关联电子系统的理论模型提供输入。
英文摘要
We study the Fermi surface topology and quasiparticle properties in the heavy fermion compound YbNi4P2 at high magnetic fields using quantum oscillation measurements. We observe a large decrease of the quasiparticle mass with increasing field and demonstrate good qualitative agreement with the single-ion Kondo model. At the putative Lifshitz transition at 17 T, we observe a sudden change of quantum oscillation frequencies suggesting an abrupt change of the electronic structure and/or quasiparticle characteristics. Our results demonstrate the ability to tune the electronic structure and provide input for theoretical models of YbNi4P2 and correlated electron systems in high magnetic fields.
Comments16 pages including SI
