Figure 9: Berry curvature for the four topological bands of acoustic Floquet topological insulator. | Nature Communications

Figure 9: Berry curvature for the four topological bands of acoustic Floquet topological insulator.

From: Floquet topological insulators for sound

Figure 9

The Berry curvature is calculated from the effective Hamiltonian in the presence of modulation. Subplots (a–d) correspond to the four dipolar bands, from lower to higher frequency, respectively. The parameters used are ν0=ω0/2π=31.13 kHz, κ=0.3ν0, J=0.7 × 10−2ν0, δν=0.036ν0 and νm=ωm/2π=3 kHz.

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