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. 2017 Jan 9;8:13741. doi: 10.1038/ncomms13741

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(a) MR in three different geometries in transport measurements at 2.5 K. (b) The negative MR only appears when E is parallel with B. The control experiments with geometries II and III exclude the crystal anisotropy effect on the observed negative MR. (c) The magneto-conductance change σ_B–σ₀ at different temperatures, following a quadratic dependence, and it decreases after a critical field. The inset summarizes the fitting coefficient α at different temperatures.