Axial Higgs mode detected by quantum pathway interference in RTe.

The observation of the Higgs boson solidified the standard model of particle physics. However, explanations of anomalies (for example, dark matter) rely on further symmetry breaking, calling for an undiscovered axial Higgs mode. The Higgs mode was also seen in magnetic, superconducting and charge density wave (CDW) systems.

Publisher Correction: A square-root topological insulator with non-quantized indices realized with photonic Aharonov-Bohm cages.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

A square-root topological insulator with non-quantized indices realized with photonic Aharonov-Bohm cages.

Topological Insulators are a novel state of matter where spectral bands are characterized by quantized topological invariants. This unique quantized nonlocal property commonly manifests through exotic bulk phenomena and corresponding robust boundary effects. In our work we study a system where the spectral bands are associated with non-quantized indices, but nevertheless possess robust boundary states.