Intrinsic V vacancy and large magnetoresistance in V_(1-δ)Sb_(2)single crystal  

作　　者：Yong Zhang Xinliang Huang Jinglei Zhang Wenshuai Gao Xiangde Zhu Li Pi 张勇;黄新亮;张警蕾;高文帅;朱相德;皮雳(Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory of the Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[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

出　　处：《Chinese Physics B》2022年第3期475-481,共7页中国物理B（英文版）

基　　金：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);the Natural Science Foundation of Anhui Province, China (Grant No. 1908085QA15)。

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-δ)Sb_(2) 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-δ)Sb_(2) is a research candidate for a flat band.

关 键 词：binary pnictide semimetals vanadium vacancy flat band weak anti-localization 

分 类 号：O469[理学—凝聚态物理]