CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Induced magneto-conductivity in a two-node Weyl semimetal under Gaussian random disorder |
Chuanxiong Xu(徐川雄)1, Haoping Yu(于昊平)2, Mei Zhou(周梅)1, and Xuanting Ji(吉轩廷)1,3,† |
1 Department of Applied Physics, China Agricultural University, Beijing 100083, China; 2 Department of Applied Mechanics, China Agricultural University, Beijing 100083, China; 3 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Measuring the magneto-conductivity induced from impurities may help determine the impurity distribution and reveal the structure of a Weyl semimetal sample. To verify this, we utilize the Gaussian random disorder to simulate charged impurities in a two-node Weyl semimetal model and investigate the impact of charged impurities on magneto-conductivity in Weyl semimetals. We first compute the longitudinal magnetic conductivity and find that it is positive and increases proportionally with the parameter governing the Gaussian distribution of charged impurities, suggesting the presence of negative longitudinal magneto-resistivity. Then we consider both the intra-valley and inter-valley scattering processes to calculate the induced transverse magneto-conductivity in the model. Our findings indicate that both inter-valley and intra-valley scattering processes play important roles in the transverse magneto-conductivity. The locations of Weyl nodes can also be determined by magneto-conductivity measurements. This is possible if the magnetic field strength and the density of charged impurities are known. Alternatively, the measurement of magnetic conductivity may reveal the distribution of charged impurities in a given sample once the locations of the Weyl nodes have been determined. These findings can aid in detecting the structure of a Weyl semimetal sample, enhancing comprehension of magnetotransport in Weyl semimetals and promoting the development of valley electronics.
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Received: 20 December 2023
Revised: 20 May 2024
Accepted manuscript online: 20 June 2024
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PACS:
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75.47.-m
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(Magnetotransport phenomena; materials for magnetotransport)
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Fund: We would like to thank Zhengang Zhu and Zhi-Fan Zhang for useful discussions. This work is supported by the National Natural Science Foundation of China (Grant No. 61974162). |
Corresponding Authors:
Xuanting Ji
E-mail: jixuanting@cau.edu.cn
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Cite this article:
Chuanxiong Xu(徐川雄), Haoping Yu(于昊平), Mei Zhou(周梅), and Xuanting Ji(吉轩廷) Induced magneto-conductivity in a two-node Weyl semimetal under Gaussian random disorder 2024 Chin. Phys. B 33 097502
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