论文标题
磁性Weyl半分候选Pralsi中野外诱导的LIFSHITZ过渡
Field-Induced Lifshitz Transition in the Magnetic Weyl Semimetal Candidate PrAlSi
论文作者
论文摘要
Lifshitz转变（LT）是指电子结构和费米表面的突然变化，并且与各种新兴量子现象有关。在已知材料中观察到的LT中，现场引起的LT很少见，其起源仍然难以捉摸。为了了解现场引起的LT的起源，重要的是要将材料基础扩展到通常的重金属的通常设置之外。在这里，我们通过对磁通转移的研究最高55 t的研究报告了Pralsi的现场引起的LT，该磁性Weyl半候选具有局部4 $ f $电子的局部候选。和$ f_3 $ = 103 t）。令人惊讶的是，LT远低于量子极限，具有明显的温度依赖性振荡频率和磁场依赖性的回旋质量。我们的工作不仅丰富了野外诱导的LT的罕见实例，而且为进一步研究拓扑，磁性和电子相关性之间的相互作用铺平了道路。
Lifshitz transition (LT) refers to an abrupt change in the electronic structure and Fermi surface, and is associated to a variety of emergent quantum phenomena. Amongst the LTs observed in known materials, the field-induced LT has been rare and its origin remains elusive. To understand the origin of field-induced LT, it is important to extend the material basis beyond the usual setting of heavy fermion metals. Here, we report on a field-induced LT in PrAlSi, a magnetic Weyl semimetal candidate with localized 4$f$ electrons, through a study of magnetotransport up to 55 T. The quantum oscillation analysis reveals that across a threshold field $B^*\approx$14.5 T the oscillation frequency ($F_1$ = 43 T) is replaced by two new frequencies ($F_2$ = 62 T and $F_3$ = 103 T). Strikingly, the LT occurs well below quantum limit, with obvious temperature-dependent oscillation frequency and field-dependent cyclotron mass. Our work not only enriches the rare examples of field-induced LTs, but also paves the way for further investigation on the interplay among topology, magnetism and electronic correlation.
