Quantum mechanics

Phase (matter)

Metallurgy

Materials science

Coupling (piping)

Phonon

Physics

Exciton

Condensed matter physics

Composite material

Optoelectronics

Insulator (electricity)

Physical Review Research

The authors use high-pressure Raman spectroscopy along with a first-principles model analysis to study the role of exciton-phonon coupling in stabilizing the excitonic insulator phase of Ta${}_{2}$NiSe${}_{5}$ at room temperature.

Destabilizing excitonic insulator phase by pressure tuning of exciton-phonon coupling