Attosecond Tracking of Topological Phase Transitions in 2D Materials

While Yuan and Golubev demonstrated that attosecond diffraction imaging reveals quantum deviations from semiclassical predictions in graphene, and Inzani and Lucchini reviewed attosecond techniques for solids, no one has applied these methods to topological phase transitions. This research would employ attosecond X-ray pulses to track how electronic band structures rearrange during the transition between topological phases in materials like WTe₂ or MoS₂. The key innovation is combining the temporal resolution of attosecond techniques with the sensitivity to topological properties, potentially observing how topological protection emerges or breaks down on electron timescales. This could answer fundamental questions about how topological order establishes itself and whether there are quantum coherence effects during these transitions that have been invisible to slower techniques.

References:

1. Attosecond electron dynamics in solid-state systems. G. Inzani, M. Lucchini (2025). Journal of Physics: Photonics.
2. Attosecond diffraction imaging of electron dynamics in solids. Mingrui Yuan, Nikolay V. Golubev (2024). Physical Review Research.