Continuous transition between antiferromagnetic insulator and paramagnetic metal in the pyrochlore iridate Eu2Ir2O7

被引：97
作者：
Ishikawa, Jun J. [1 ]
O'Farrell, Eoin C. T. [1 ]
Nakatsuji, Satoru [1 ]
机构：
[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
来源：
PHYSICAL REVIEW B | 2012年 / 85卷 / 24期
关键词：
SPIN-ORBIT INTERACTION; TOPOLOGICAL INSULATORS; R2IR2O7; R; EU; FERROMAGNETICS; OXIDES; BAND;
D O I：
10.1103/PhysRevB.85.245109
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Our single crystal study of the magnetothermal and transport properties of the pyrochlore iridate Eu2Ir2O7 reveals a continuous phase transition from a paramagnetic metal to an antiferromagnetic insulator for a sample with stoichiometry within similar to 1% resolution. The insulating phase has strong proximity to an antiferromagnetic semimetal, which is stabilized by several % level of the off-stoichiometry. Our observations suggest that in addition to electronic correlation and spin-orbit coupling the magnetic order is essential for opening the charge gap.
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页数：6
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