Structural phase transition of anisotropic particles and formation of orientation-strain glass with addition of impurities

Details Structural phase transition of anisotropic particles and formation of orientation-strain glass with addition of impurities Structural phase transition of anisotropic particles and formation of orientation-strain glass with addition of impurities

2011-12-22

arxiv.org/abs/1112.5358v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures

Scientific paper

Using a modified Lennard-Jones model for anisotropic particles, we present results of molecular dynamics simulation in two dimensions. In one-component systems, we find crystallization, a Berezinskii-Kosterlitz-Thouless phase, and a structural phase transition, as the temperatures is lowered. In the lowest temperature range, the crystal is composed of three martensitic variants on a hexagonal lattice, exhibiting the shape memory effect. With addition of larger spherical particles (impurities), these domains are finely divided, yielding glass with slow time evolution. With increasing the impurity size, the structural or translational disorder is also proliferated.

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