Fig. 3: Transient tunneling anomaly.
a Tr-MERTS spectra measured at ν = 1 for different npump. The spectra are taken immediately after pumping the N = 1 LL at t = 0 s. Double-peak structure develops with increasing npump (see the dashed circles). b A Δk = 0.014 Å−1 cut of the spectrum measured as a function of npump at t = 0 s. Open circles mark the tunneling peaks determined from Gaussian curve fitting. c B⊥ dependence of the transient level splitting Δtransient. The open circles denote the measured splitting. The red curve is the splitting calculated from the exact diagonalization model: Δtransient = 0.29 × Eex, where Eex ≈ 0.88 meV at B⊥ = 1 Tesla, and Eex increases with the square root of B⊥15. (see Fig. 4b). d A Δk cut of the spectrum measured as a function of static electron density \(\Delta\)nstatic referenced to ν = 1. Notice that the equilibrium system does not exhibit the splitting displayed in (b) (see also Supplementary Fig. 9). e Waterfall plot demonstrating time delay dependence of a splitting at B⊥ = 8 T and npump = 5.5 × 109 cm−2. The grey lines represent Gaussian curves that depict double-peak structure observed at t = 0. The split levels merge into a single peak after ~500 ns.
