Negative Differential Friction Predicted in 2D Ferroelectric In₂ Se₃ Commensurate Contacts.

ABSTRACT: At the macroscopic scale, the friction force (f) is found to increase with the normal load (N), according to the classic law of Da Vinci-Amontons, namely, f = µN, with a positive definite friction coefficient (μ). Here, first-principles calculations are employed to predict that, the static force f, measured by the corrugation in the sliding potential energy barrier, is lowered upon increasing the normal load applied on one layer of the recently discovered ferroelectric In₂ Se₃ over another commensurate layer of In₂ Se₃ . That is, a negative differential friction coefficient μ can be realized, which thus simultaneously breaking the classic Da Vinci-Amontons law. Such a striking and counterintuitive observation can be rationalized by the delicate i

SUBMITTER: Sun J 

PROVIDER: S-EPMC8805561 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature