A study of moiré bilayer MoTe₂ shows that the material's quantum phase diagrams change appreciably with the twist angle between the two layers. This geometric parameter, easily tuned in the laboratory, thus acts as a control knob over the collective states that emerge in the system.

Moiré materials formed by stacking two-dimensional layers with a small orientational mismatch have attracted attention in recent years because the competition between energy scales in them can favour correlated states. In bilayer MoTe₂, that competition is reflected in a phase diagram that now proves sensitive to the twist angle, broadening the range of behaviours accessible in a single platform.

The work examines how the phases evolve as the twist angle is varied and relates the observed changes to the band structure of the system. Tuning that angle modifies the moiré lattice and, with it, the way carriers organise themselves, which alters the bilayer's quantum phase diagram.

The significance of the result is that it turns the twist angle into a design variable for exploring correlated quantum phases in thin-film semiconductors. If confirmed and extended, this dependence could guide the design of devices that exploit tunable quantum states in heterostructures of two-dimensional materials.