Part-per-million quantization and current-induced breakdown of the quantum anomalous Hall effect

doi:10.1103/PhysRevB.98.075145

	Part-per-million quantization and current-induced breakdown of the quantum anomalous Hall effect
	Fox, E. J.1,2; Rosen, I. T.2,3; Yang, Yanfei 4; Jones, George R.4; Elmquist, Randolph E.4; Kou, Xufeng5,6 ; Pan, Lei 5; Wang, Kang L.5; Goldhaber-Gordon, D.1,2
	2018-08-27
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	98 期号:7
发表状态	已发表
DOI	10.1103/PhysRevB.98.075145
摘要	In the quantum anomalous Hall effect, quantized Hall resistance and vanishing longitudinal resistivity are predicted to result from the presence of dissipationless, chiral edge states and an insulating two-dimensional bulk, without requiring an external magnetic field. Here, we explore the potential of this effect in magnetic topological insulator thin films for metrological applications. Using a cryogenic current comparator system, we measure quantization of the Hall resistance to within one part per million and, at lower current bias, longitudinal resistivity under 10 m Omega at zero magnetic field. Increasing the current density past a critical value leads to a breakdown of the quantized, low-dissipation state, which we attribute to electron heating in bulk current flow. We further investigate the prebreakdown regime by measuring transport dependence on temperature, current, and geometry, and find evidence for bulk dissipation, including thermal activation and possible variable-range hopping.
收录类别	SCI ; SCIE
语种	英语
资助项目	National Science Foundation[ECCS-1542152]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000442806600001
出版者	AMER PHYSICAL SOC
WOS关键词	GRAPHENE DEVICES ; DIRAC-FERMION ; STATE ; CONDUCTIVITY ; TEMPERATURE ; TRANSPORT ; METROLOGY ; BEHAVIOR
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/27626
专题	信息科学与技术学院_PI研究组_寇煦丰组
通讯作者	Goldhaber-Gordon, D.
作者单位	1.Stanford Univ, Dept Phys, Stanford, CA 94305 USA 2.SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA 3.Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA 4.NIST, Gaithersburg, MD 20899 USA 5.Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA 6.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China
推荐引用方式 GB/T 7714	Fox, E. J.,Rosen, I. T.,Yang, Yanfei,et al. Part-per-million quantization and current-induced breakdown of the quantum anomalous Hall effect[J]. PHYSICAL REVIEW B,2018,98(7).
APA	Fox, E. J..,Rosen, I. T..,Yang, Yanfei.,Jones, George R..,Elmquist, Randolph E..,...&Goldhaber-Gordon, D..(2018).Part-per-million quantization and current-induced breakdown of the quantum anomalous Hall effect.PHYSICAL REVIEW B,98(7).
MLA	Fox, E. J.,et al."Part-per-million quantization and current-induced breakdown of the quantum anomalous Hall effect".PHYSICAL REVIEW B 98.7(2018).