Topological change of the Fermi surface in ternary iron pnictides with reduced c/a ratio: a de Haas-van Alphen study of CaFe2P2.
Topological change of the Fermi surface in ternary iron pnictides with reduced c/a ratio: a de Haas-van Alphen study of CaFe2P2.
复制标题
DOI：
10.1103/physrevlett.103.026404
复制
发表时间：
2009-05
影响因子：
8.6
通讯作者：
A. Coldea;C. Andrew;J. Analytis;J. Analytis;Ross McDonald;A. Bangura;Jiun-Haw Chu;Jiun-Haw Chu;I. Fisher;I. Fisher;Antony Carrington
中科院分区：
文献类型：
--
作者：
A. Coldea;C. Andrew;J. Analytis;J. Analytis;Ross McDonald;A. Bangura;Jiun-Haw Chu;Jiun-Haw Chu;I. Fisher;I. Fisher;Antony Carrington
本文报道了在45 T的低温下用转矩磁强计对CaFe_2 P_2费米面的de Haas-van Alphen效应的研究。该系统是一个密切的结构类似物的崩溃的四相的CaFe 2As 2。我们发现费米面的CaFe 2 P2不同于其他相关的三元磷化物，它的拓扑结构是高度分散的c轴，是三维的字符和相同的质量增强的电子和空穴口袋（约1.5）。这表明，当氮族元素层之间的键合变得重要时，嵌套条件不满足。
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 analog of the collapsed tetragonal nonmagnetic 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 ( approximately 1.5). This suggests that when the bonding between pnictogen layers becomes important nesting conditions are not fulfilled.