Gigantic negative magnetoresistance in a disordered topological insulator
arXiv:1703.10784 · doi:10.1038/ncomms15545
Abstract
With the recent discovery of Weyl semimetals, the phenomenon of negative magnetoresistance (MR) is attracting renewed interest. While small negative MR can occur due to the suppression of spin scattering or weak localization, large negative MR is rare in materials, and when it happens, it is usually related to magnetism. The large negative MR in Weyl semimetals is peculiar in that it is unrelated to magnetism and comes from chiral anomaly. Here we report that there is a new mechanism for large negative MR which is not related to magnetism but is related to disorder. In the newly-synthesized bulk-insulating topological insulator TlBiSbTe, we observed gigantic negative MR reaching 98% in 14 T at 10 K, which is unprecedented in a nonmagnetic system. Supported by numerical simulations, we argue that this phenomenon is likely due to the Zeeman effect on a barely percolating current path formed in the disordered bulk. Since disorder can also lead to non-saturating linear MR in AgSe, the present finding suggests that disorder engineering in narrow-gap systems is useful for realizing gigantic MR in both positive and negative directions.
Theory part substantially extended. 12 pages, 4 figures
References in corpus (11)
- Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP
- Observation of Dirac Holes and Electrons in a Topological Insulator
- Chiral Anomaly and Diffusive Magnetotransport in Weyl Metals
- Direct Evidence for the Dirac-Cone Topological Surface States in Ternary Chalcogenide TlBiSe2
- Axial anomaly and longitudinal magnetoresistance of a generic three dimensional metal
- Why is the bulk resistivity of topological insulators so small?
- Non-saturating magnetoresistance of inhomogeneous conductors: comparison of experiment and simulation
- Revealing puddles of electrons and holes in compensated topological insulators
- Inter-planar coupling dependent magnetoresistivity in high purity layered metals
- Anomalously small resistivity and thermopower of strongly compensated semiconductors and topological insulators
- Metal-insulator transition and tunable Dirac-cone surface state in the topological insulator TlBi1-xSbxTe2 studied by angle-resolved photoemission
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