We note that, although the value of the Wigner parameter R W = 7.07 in this section is not strong enough (compared to R W = 10.0 in Sec. II A) to suppress the E ⊕ ST energy below E V , the value of E ⊕ ST at ε = 2.8 is still drastically lower than the orbital gap hω 0 = 0.80 meV = 193.44h GHz, i.e., at ε = 2.95 meV, one has E ⊕ ST ≈ 21.52h GHz in Fig. (a) and, at ε = 2.81 meV, E ⊕ ST ≈ 27.84h GHz in Fig. ; for the denition of the Wigner parameter R W , see Sec. III A.