(a) Sheet resistance versus temperature for 5-nm LCMO (x = 0.2) at V_G = 0 (black line), −3 (red line), and +3 V (blue line).^[123] (b) Magnetic field dependence of the anomalous Hall conductivity σ_AH at 300 K for Co: TiO₂, measured at different V_G. The values of electron density n at each V_G obtained from the ordinary Hall effect are shown in parentheses.^[125]