Researchers demonstrate resonant chiral dressing in a ferroaxial charge density wave
Updated
Updated · Nature.com · May 1
Researchers demonstrate resonant chiral dressing in a ferroaxial charge density wave
1 articles · Updated · Nature.com · May 1
Using helicity-resolved Raman micro-spectroscopy on 4Hb-TaS2, the team probed individual ferroaxial domains and found temperature-dependent coupling between phonons and charge-order amplitude fluctuations.
The study says this interaction dynamically dresses phonons with collective charge-order fluctuations, involving the electronic state's planar chirality and enabling otherwise symmetry-forbidden coupling under thermodynamic equilibrium.
Researchers propose order-parameter dynamics as a general route to mediate forbidden interactions in crystalline solids, potentially broadening understanding of collective excitations in complex quantum materials.
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