Fig. 3: B-fields dependence of the longitudinal third-harmonic voltage in MiBi2Te4. | Nature Communications

Fig. 3: B-fields dependence of the longitudinal third-harmonic voltage in MiBi2Te4.

From: Quantum geometry quadrupole-induced third-order nonlinear transport in antiferromagnetic topological insulator MnBi2Te4

Fig. 3

a The out-of-plane B-fields dependence of the \({V}_{{xx}}^{3\omega }\) measured at different temperatures. b The calculated \({\sigma }_{{xxxx}}\) contributed by quantum metric as a function of the magnetic order parameter Δ. c–e The band splitting and distribution of quantum metric Gxx (color scale) under different magnetic order parameter Δ = 0 (c), Δ = 0.2 (d), and Δ = 0.7 (e), where the black dashed line indicates the chemical potential.

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