三元铁磷族化合物中费米面的拓扑变化：CaFe2P2的dHvA研究
Topological change of the Fermi surface in ternary iron-pnictides with reduced c/a ratio: A dHvA study of CaFe2P2
摘要：
本文报道了在45 T低温下用转矩磁强计研究CaFe_2 P_2费米面的de Haas-van Alphen效应。该系统是一个紧密的结构类似物的崩溃tetraxos非磁性相的CaFe 2As 2。我们发现CaFe 2 P2的费米面不同于其他相关的三元磷化物，因为它的拓扑结构在c轴上是高度分散的，具有三维特征，并且在电子和空穴袋上具有相同的质量增强（~1.5）。费米表面拓扑结构的巨大变化表明，在c/a比降低的状态下，当氮族元素层之间的键合变得重要时，费米表面片不太可能嵌套。
英文摘要：
We report a de Haas-van Alphen effect study of the Fermi surface of CaFe2P2 using low temperature torque magnetometry up to 45 T. This system is a close structural analogue of the collapsed tetragonal non-magnetic phase of CaFe2As2. We find the Fermi surface of CaFe2P2 to differ from other related ternary phosphides in that its topology is highly dispersive in the c-axis, being three-dimensional in character and with identical mass enhancement on both electron and hole pockets (~1.5). The dramatic change in topology of the Fermi surface suggests that in a state with reduced (c/a) ratio, when bonding between pnictogen layers becomes important, the Fermi surface sheets are unlikely to be nested.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
