| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Analytical formula describing the non-saturating linear magnetoresistance in inhomogeneous conductors |
| Shan-Shan Chen(陈珊珊)†, Yang Yang(杨阳)†, and Fan Yang(杨帆)‡ |
| Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin 300350, China |
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Abstract The effective-medium theory (EMT) has proved successful in modeling the non-saturating linear magnetoresistance induced by inhomogeneity. However, calculating magnetoresistance using the EMT usually involves solving coupled integral equations which have no analytical solutions, and therefore, it is still difficult to directly compare the predictions of EMT with experimental data. Here we demonstrate that the linear magnetoresistance predicted by the EMT can be either exactly formulated or well approximated by a simple analytical equation $\Delta\rho/\rho_0=\sqrt{k^2B^2+a^2}-a$ in a number of known situations. The relations between the EMT parameters and the phenomenological parameters $k$ and $a$ are evaluated. Our results provide a convenient and effective method for extracting the EMT parameters from experimental data.
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Received: 08 March 2022
Revised: 08 April 2022
Accepted manuscript online: 08 April 2022
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PACS:
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73.50.Jt
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(Galvanomagnetic and other magnetotransport effects)
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72.20.My
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(Galvanomagnetic and other magnetotransport effects)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11904259) and the Natural Science Foundation of Tianjin (Grant No. 20JC-QNJC02040). |
Corresponding Authors:
Fan Yang
E-mail: fanyangphys@tju.edu.cn
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Cite this article:
Shan-Shan Chen(陈珊珊), Yang Yang(杨阳), and Fan Yang(杨帆) Analytical formula describing the non-saturating linear magnetoresistance in inhomogeneous conductors 2022 Chin. Phys. B 31 087303
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