Uncovering the Hidden Ferroaxial Density Wave as the Origin of the Axial Higgs Mode in RTe${}_3$

Birender Singh, Grant McNamara, Kyung-Mo Kim +24

The recent discovery of an axial amplitude (Higgs) mode in the long-studied charge density wave (CDW) systems GdTe${}_3$ and LaTe${}_3$ suggests a heretofore unidentified hidden order.…