Intrinsic V vacancy and large magnetoresistance in V1-δSb2 single crystal

doi:10.1088/1674-1056/ac3070

中国物理B ›› 2022, Vol. 31 ›› Issue (3): 37102-037102.doi: 10.1088/1674-1056/ac3070

Intrinsic V vacancy and large magnetoresistance in V_1-δSb₂ single crystal

Yong Zhang(张勇)^1,2, Xinliang Huang(黄新亮)², Jinglei Zhang(张警蕾)², Wenshuai Gao(高文帅)^1,†, Xiangde Zhu(朱相德)^2,‡, and Li Pi(皮雳)²

1 Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China;
2 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Sciences, Hefei 230031, China

收稿日期:2021-09-17 修回日期:2021-10-08 接受日期:2021-10-18 出版日期:2022-02-22 发布日期:2022-02-24
通讯作者: Wenshuai Gao, Xiangde Zhu E-mail:gwsh@ahu.edu.cn;xdzhu@hmfl.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. U2032214, U2032163, and 11904002), the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2017483), and the Natural Science Foundation of Anhui Province, China (Grant No. 1908085QA15).

Intrinsic V vacancy and large magnetoresistance in V_1-δSb₂ single crystal

Yong Zhang(张勇)^1,2, Xinliang Huang(黄新亮)², Jinglei Zhang(张警蕾)², Wenshuai Gao(高文帅)^1,†, Xiangde Zhu(朱相德)^2,‡, and Li Pi(皮雳)²

1 Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China;
2 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Sciences, Hefei 230031, China

Received:2021-09-17 Revised:2021-10-08 Accepted:2021-10-18 Online:2022-02-22 Published:2022-02-24
Contact: Wenshuai Gao, Xiangde Zhu E-mail:gwsh@ahu.edu.cn;xdzhu@hmfl.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. U2032214, U2032163, and 11904002), the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2017483), and the Natural Science Foundation of Anhui Province, China (Grant No. 1908085QA15).

摘要/Abstract

摘要： The binary pnictide semimetals have attracted considerable attention due to their fantastic physical properties that include topological effects, negative magnetoresistance, Weyl fermions, and large non-saturation magnetoresistance. In this paper, we have successfully grown the high-quality V_1-δSb₂ single crystals by Sb flux method and investigated their electronic transport properties. A large positive magnetoresistance that reaches 477% under a magnetic field of 12 T at T = 1.8 K was observed. Notably, the magnetoresistance showed a cusp-like feature at the low magnetic fields and such feature weakened gradually as the temperature increased, which indicated the presence of a weak antilocalization effect (WAL). In addition, based upon the experimental and theoretical band structure calculations, V_1-δSb₂ is a research candidate for a flat band.

关键词: binary pnictide semimetals, vanadium vacancy, flat band, weak anti-localization

Abstract: The binary pnictide semimetals have attracted considerable attention due to their fantastic physical properties that include topological effects, negative magnetoresistance, Weyl fermions, and large non-saturation magnetoresistance. In this paper, we have successfully grown the high-quality V_1-δSb₂ single crystals by Sb flux method and investigated their electronic transport properties. A large positive magnetoresistance that reaches 477% under a magnetic field of 12 T at T = 1.8 K was observed. Notably, the magnetoresistance showed a cusp-like feature at the low magnetic fields and such feature weakened gradually as the temperature increased, which indicated the presence of a weak antilocalization effect (WAL). In addition, based upon the experimental and theoretical band structure calculations, V_1-δSb₂ is a research candidate for a flat band.

Key words: binary pnictide semimetals, vanadium vacancy, flat band, weak anti-localization

中图分类号: (Electron density of states and band structure of crystalline solids)

71.20.-b

72.10.Fk (Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect)) 72.15.Rn (Localization effects (Anderson or weak localization)) 72.15.-v (Electronic conduction in metals and alloys)

Yong Zhang(张勇), Xinliang Huang(黄新亮), Jinglei Zhang(张警蕾), Wenshuai Gao(高文帅), Xiangde Zhu(朱相德), and Li Pi(皮雳). Intrinsic V vacancy and large magnetoresistance in V_1-δSb₂ single crystal[J]. 中国物理B, 2022, 31(3): 37102-037102.

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Intrinsic V vacancy and large magnetoresistance in V_1-δSb₂ single crystal

Intrinsic V vacancy and large magnetoresistance in V_1-δSb₂ single crystal

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