Fig. 3

Bias spectroscopy and g-factor measurements. a, b Colour plots of bias spectroscopy as a function of V_P (a) and ΔV_TG = V_TG + 2084 mV (b), showing Coulomb diamonds with E_C = 1.3(1) meV. c Schematic drawing of the Zeeman splitting ΔE_Z = gμ_BB of the quantum dot levels, illustrating the hole transport via the Zeeman-split energy levels. d Bias spectroscopy showing the line splitting in a 2.9 T in-plane field. Dashed line indicates the cut plotted in e. e Differential conductance as a function of ΔV_P for B = 3 T, at V_SD = −0.26 mV. Solid line corresponds to a fit to the data using the sum of five Gaussian profiles. f, g Differential conductance for both the ground (f) and the excited state (g) as a function of B and ΔV_P, with \({\mathrm{\Delta }}V_{\mathrm{P}} = V_{\mathrm{P}} - \overline V _{{\mathrm{peak}}}\) and \(\overline V _{{\mathrm{peak}}}\) being the average voltage of the two transition peaks corresponding to either the ground or the excited state (for raw data, see Supplementary Fig. 3). Dotted lines represent linear fits to the peak positions (same as in g). h Energy splittings for the ground and excited state as a function of B. Solid lines are linear fits to the data yielding the corresponding g-factors