Extended Data Fig. 9: Zitterbewegung in a topological surface state.
From: Tunable non-integer high-harmonic generation in a topological insulator
Left: three-dimensional scheme of the Dirac-like electron dispersion of the TSS. The blue arrow highlights the quantum interference of different branches of the Dirac system. Right: high-frequency oscillations (blue waveform) indicative of Zitterbewegung depend on the energy separation of the interfering states residing at different energy branches in our quantum mechanical calculations. The black waveform represents the driving THz field ETHz.
