Mechanism of charge-density-wave formation

Determine the mechanism responsible for charge-density-wave formation in charge-density-wave materials.

Background

The paper situates TiSe₂ research within the broader study of charge-density-wave (CDW) systems and notes that the microscopic origin of CDW formation remains unresolved. Identifying this mechanism is important for understanding the collective electronic and lattice properties of CDW states and for developing methods to control them using ultrafast optical excitation.

References

However, the reason why it explicitly depends on $c/a$ is not straightforward and still has to be explained.

— Tuning Charge Density Wave transitions through lattice strain in NbSe3  (2609.09375 - Frantz et al., 8 Sep 2026) in Section III, subsection “Resistance along the chains direction under uniaxial tensile stresses”

At the same time, many physical questions in CDW physics remain unresolved, including the mechanism of CDW formation.

— Spectroscopic signatures of mode-selective electron-phonon coupling in transient reflectivity change on charge-density-wave TiSe$_2$  (2609.10348 - Mizukoshi et al., 9 Sep 2026) in Introduction, opening paragraph