Dimerization-Induced Fermi-Surface Reconstruction in IrTe2
Dimerization-Induced Fermi-Surface Reconstruction in IrTe2
复制标题
DOI：
10.1103/physrevlett.113.266406
复制
发表时间：
2014-12-30
影响因子：
8.6
通讯作者：
Kim, Jun Sung
中科院分区：
文献类型：
--
作者：
Eom, Man Jin;Kim, Kyoo;Kim, Jun Sung
报道了二聚体形成复杂的IrTe2单晶的De Haas-van Alphen(DHvA)振荡研究。通过比较dHvA振动与能带结构的角度关系，我们发现了1/5型和1/8型二聚体引起的不同的费米面重构。这证明了在两种情况下，都有一个有趣的准二维导电层是由二聚化引起的。向二聚体密度较高的1/8相的相变表明，与二聚体内和二聚体间耦合相关的局部不稳定性是IrTe2中形成复杂二聚体的主要驱动力。
We report a de Haas-van Alphen (dHvA) oscillation study on IrTe2 single crystals showing complex dimer formations. By comparing the angle dependence of dHvA oscillations with band structure calculations, we show distinct Fermi surface reconstruction induced by a 1/5-type and a 1/8-type dimerizations. This verifies that an intriguing quasi-two-dimensional conducting plane across the layers is induced by dimerization in both cases. A phase transition to the 1/8 phase with higher dimer density reveals that local instabilities associated with intra-and interdimer couplings are the main driving force for complex dimer formations in IrTe2.