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Title: Nonlinear magnetotransport shaped by Fermi surface topology and convexity
Authors: He, P. 
Hsu, C.-H. 
Shi, S. 
Cai, K. 
Wang, J. 
Wang, Q. 
Eda, G. 
Lin, H.
Pereira, V.M. 
Yang, H. 
Issue Date: 2019
Publisher: Nature Publishing Group
Citation: He, P., Hsu, C.-H., Shi, S., Cai, K., Wang, J., Wang, Q., Eda, G., Lin, H., Pereira, V.M., Yang, H. (2019). Nonlinear magnetotransport shaped by Fermi surface topology and convexity. Nature Communications 10 (1) : 1290. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: The nature of Fermi surface defines the physical properties of conductors and many physical phenomena can be traced to its shape. Although the recent discovery of a current-dependent nonlinear magnetoresistance in spin-polarized non-magnetic materials has attracted considerable attention in spintronics, correlations between this phenomenon and the underlying fermiology remain unexplored. Here, we report the observation of nonlinear magnetoresistance at room temperature in a semimetal WTe 2 , with an interesting temperature-driven inversion. Theoretical calculations reproduce the nonlinear transport measurements and allow us to attribute the inversion to temperature-induced changes in Fermi surface convexity. We also report a large anisotropy of nonlinear magnetoresistance in WTe 2 , due to its low symmetry of Fermi surfaces. The good agreement between experiments and theoretical modeling reveals the critical role of Fermi surface topology and convexity on the nonlinear magneto-response. These results lay a new path to explore ramifications of distinct fermiology for nonlinear transport in condensed-matter. © 2019, The Author(s).
Source Title: Nature Communications
ISSN: 20411723
DOI: 10.1038/s41467-019-09208-8
Rights: Attribution 4.0 International
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