Work

Nucleation kinetics and virtual melting in shear-induced structural transitions

Year: 2024

Type: article

Abstract: Large shear deformations can induce structural changes within crystals, yet the microscopic kinetics underlying these transformations are difficult for experimental observation and theoretical understanding. Here, we drive shear-induced structural transitions from square (◻) lattices to triangular (△) lattices in thin-film colloidal crystals and directly observe the accompanying kinetics with single-particle resolution inside the bulk crystal. When the oscillatory shear strain amplitude0.1⩽γm<0.4,△-lattice nuclei are surrounded by a liquid layer throughout their growth due to localized shear strain at the interface. Such virtual melting at crystalline interface has been predicted in theory and simulation, but have not been observed in experiment. The mean liquid layer thickness is proportional to the shear which can be explained by the Lindemann melting criterion. This provides an alternative explanation on virtual melting.

Source: Reports on Progress in Physics

DOI: 10.1088/1361-6633/ad99fd

Authors: Wei Li, Yi Peng, Tim Still, A G Yodh, Yilong Han

Institutions: Hong Kong University of Science and Technology, Chinese Academy of Sciences, Institute of Physics, University of Chinese Academy of Sciences, University of Pennsylvania

Language: English

Topic: Material Dynamics and Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,455

Funders: Glaucoma Research Foundation, University of Pennsylvania