Correlated Dirac semimetallic state with unusual positive magnetoresistance in strain-free perovskite SrIrO3

被引：43
|
作者：
Fujioka, J. [1 ,2 ,3 ]
Okawa, T. [1 ,2 ]
Yamamoto, A. [4 ]
Tokura, Y. [1 ,2 ,4 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
[2] Univ Tokyo, QPEC, Tokyo 1138656, Japan
[3] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan
[4] RIKEN, CEMS, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
来源：
PHYSICAL REVIEW B | 2017年 / 95卷 / 12期
关键词：
THIN-FILMS; NONSATURATING MAGNETORESISTANCE; CD3AS2; METAL;
D O I：
10.1103/PhysRevB.95.121102
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigated magnetotransport properties and charge dynamics of strain-free perovskite SrIrO3. Both the longitudinal and transverse magnetoresistivity (MR) are significantly enhanced with decreasing temperature, in accord with the evolution of the Dirac semimetallic state. The electron correlation effect in the Dirac state shows up as a dramatic change in charge dynamics with temperature and as an enhanced paramagnetic susceptibility. We propose that the field-induced topological transition of the Dirac node coupled to the enhanced paramagnetism causes the unique MR of correlated Dirac electrons.
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页数：5
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