Current induced electromechanical strain in thin antipolar Ag₂Se semiconductor.

ABSTRACT: Electromechanical coupling permits energy conversion between electrical and elastic forms, with wide applications^1,2. This conversion is usually observed in dielectric materials as piezoelectricity and electrostriction^3-7. Electromechanical coupling response has also been observed in semiconductors⁸, however, the mechanism in semiconductors with a small bandgap remains contentious. Here we present a breakthrough discovery of a giant electromechanical strain triggered by the electric current in thin antipolar Ag₂Se semiconductor. This phenomenon is made possible by the alteration of dipoles at a low current density (step I), followed by a phase transition under a moderate current density (step II), leading to a local strain of 6.7% measured by in-

SUBMITTER: Luo H 

PROVIDER: S-EPMC11842724 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature