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arXiv 1503.07571cond-mat.mtrl-sci
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单晶NbAs的磁输运

Magnetotransport of single crystalline NbAs

N. J. Ghimire, Yongkang Luo, M. Neupane, D. J. Williams, E. D. Bauer, F. Ronning

摘要:

本文报道了铌砷单晶在零磁场和外加磁场下的输运测量结果。横向和纵向磁阻在这个四重结构的平面不饱和高达9 T。在横向构型($H \parallel c$,$I \perp c$)中,在2 K时为230,000\%.在低于$\sim$ 150 K时,霍尔系数从室温下的类空穴转变为类电子。在2 K下基于单带近似计算的电子载流子密度和迁移率分别为1.8 × 10 $^{19}$ cm $^{-3}$和3.5 × 10 $^{5}$ cm $^2$ /Vs。这些值是类似的报道值的钽砷和铌磷,并进一步强调,这类非中心对称的,过渡金属nanictides是一个有前途的家庭探索外尔半金属的性质和后果,其新颖的电子结构。

英文摘要:

We report transport measurement in zero and applied magnetic field on a single crystal of NbAs. Transverse and longitudinal magnetoresistance in the plane of this tetragonal structure does not saturate up to 9 T. In the transverse configuration ($H \parallel c$, $I \perp c$) it is 230,000 \% at 2 K. The Hall coefficient changes sign from hole-like at room temperature to electron-like below $\sim$ 150 K. The electron carrier density and mobility calculated at 2 K based on a single band approximation are 1.8 x 10$^{19}$ cm$^{-3}$ and 3.5 x 10$^{5}$ cm$^2$/Vs, respectively. These values are similar to reported values for TaAs and NbP, and further emphasize that this class of noncentrosymmetric, transition-metal monopnictides is a promising family to explore the properties of Weyl semimetals and the consequences of their novel electronic structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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