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

被引：100

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.

引用

页数：6

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