Large anomalous Hall angle accompanying the sign change of anomalous Hall conductance in the topological half-Heusler compound HoPtBi

被引：13

作者：

Chen, Jie ^{[1
,2
]}

Xu, Xing ^{[1
]}

Li, Hang ^{[2
]}

Guo, Tengyu ^{[1
]}

Ding, Bei ^{[2
]}

Chen, Peng ^{[1
]}

Zhang, Hongwei ^{[2
]}

Xi, Xuekui ^{[1
,2
]}

Wang, Wenhong ^{[1
,2
]}

机构：

[1] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

[2] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW B | 2021年 / 103卷 / 14期

基金：

中国博士后科学基金; 美国国家科学基金会;

关键词：

WEYL FERMIONS;

D O I：

10.1103/PhysRevB.103.144425

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Controlling the anomalous Hall effect (AHE) in magnetic topological materials is an important property. Because of the close relationship between anomalous Hall conductance (AHC) and topological band (strong Berry curvature), AHC can be effectively tuned by magnetic field combined with strong spin-orbit interaction and special band structure. In this work, we observed a magnetic field driving the nonmonotonic magnetic field dependence of anomalous Hall resistivity and the sign change in magnetic-field-induced Weyl semimetal HoPtBi. The tunable ranges of the AHC and the anomalous Hall angle are -75 similar to 73 Omega(-1) cm(-1) and -12.3 similar to 9.1%, respectively. Anisotropic measurements identified the magnetic field is the key factor in controlling the additional Hall term sign. Further analysis indicated that it originated from the field-induced shift of the Weyl points via exchange splitting of bands near the Fermi level. The large tunable effect of the magnetic field on the electronic band structure provides a path to tune the topological properties in this system. These findings suggest that HoPtBi is a good platform for tuning the Berry phase and AHC with the magnetic field.

引用

页数：8

共 51 条

[1] Half-metallicity versus symmetry in half-Heusler alloys based on Pt, Ni, and Co: An ab initio study [J].

Baral, Madhusmita ;

Chakrabarti, Aparna .

PHYSICAL REVIEW B, 2019, 99 (20)

[2]

Blaha P., 2001, AUGMENTED PLANE WAVE

[3] Anomalous Hall Effect in Weyl Metals [J].

Burkov, A. A. .

PHYSICAL REVIEW LETTERS, 2014, 113 (18)

[4] Chiral anomaly factory: Creating Weyl fermions with a magnetic field [J].

Cano, Jennifer ;

Bradlyn, Barry ;

Wang, Zhijun ;

Hirschberger, Max ;

Ong, N. P. ;

Bernevig, B. A. .

PHYSICAL REVIEW B, 2017, 95 (16)

[5] Half-Heusler compounds: novel materials for energy and spintronic applications [J].

Casper, F. ;

Graf, T. ;

Chadov, S. ;

Balke, B. ;

Felser, C. .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 2012, 27 (06)

[6]

Chadov S, 2010, NAT MATER, V9, P541, DOI [10.1038/nmat2770, 10.1038/NMAT2770]

[7]

Chen J, 2020, APPL PHYS LETT, V116

[8] Large anomalous Hall angle in a topological semimetal candidate TbPtBi [J].

Chen, Jie ;

Li, Hang ;

Ding, Bei ;

Zhang, Hongwei ;

Liu, Enke ;

Wang, Wenhong .

APPLIED PHYSICS LETTERS, 2021, 118 (03)

[9] Tunable positive magnetoresistance and crossover from weak antilocalization to weak localization transition in half-Heusler compounds RPtBi (R=lanthanide) [J].

Chen, Jie ;

Li, Hang ;

Ding, Bei ;

Hou, Zhipeng ;

Liu, Enke ;

Xi, Xuekui ;

Wu, Guangheng ;

Wang, Wenhong .

APPLIED PHYSICS LETTERS, 2020, 116 (10)

[10] Stabilizing and increasing the magnetic moment of half-metals: The role of Li in half-Heusler LiMnZ (Z=N, P, Si) [J].

Damewood, L. ;

Busemeyer, B. ;

Shaughnessy, M. ;

Fong, C. Y. ;

Yang, L. H. ;

Felser, C. .

PHYSICAL REVIEW B, 2015, 91 (06)

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