Table S1.

Effective Fermi velocities of different LL transitions obtained by the two methods

LL transition	Fermi velocity (method 1) (m/s)	Fermi velocity (method 2) (m/s)
T2	5.06 $\times$ 105	5.04 $\times$ 105
T3	4.97 $\times$ 105	5.00 $\times$ 105
T4	4.97 $\times$ 105	5.00 $\times$ 105
T5	4.94 $\times$ 105	4.98 $\times$ 105
T6	4.92 $\times$ 105	4.97 $\times$ 105
T7	4.90 $\times$ 105	4.95 $\times$ 105
T1*	4.07 $\times$ 105	4.63 $\times$ 105

Method 1: both ∆ and $v_{\text{F}}$ are free parameters. Method 2: the gap value is fixed, ∆ ∼ 10 ± 2 meV and $v_{\text{F}}$ is a free parameter.