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, Yanfei4; Jones, George R.4; Elmquist, Randolph E.4; Kou, Xufeng5,6; Pan, Lei5; Wang, Kang L.5; Goldhaber-Gordon, D.1,2
2018-08-27
Source PublicationPHYSICAL REVIEW B
ISSN2469-9950
Volume98Issue:7
Status已发表
DOI10.1103/PhysRevB.98.075145
AbstractIn 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.
Indexed BySCI
Language英语
Funding ProjectNational Science Foundation[ECCS-1542152]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000442806600001
PublisherAMER PHYSICAL SOC
WOS KeywordGRAPHENE DEVICES ; DIRAC-FERMION ; STATE ; CONDUCTIVITY ; TEMPERATURE ; TRANSPORT ; METROLOGY ; BEHAVIOR
Original Document TypeArticle
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/27626
Collection信息科学与技术学院_PI研究组_寇煦丰组
Corresponding AuthorGoldhaber-Gordon, D.
Affiliation1.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
Recommended Citation
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).
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