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- W2900020984 abstract "The 90° and 30° partial glide dislocations in ZnS are investigated theoretically in the framework of the fully discrete Peierls model and first-principles calculation. It is found that there are four types of equilibrium cores for each kind of partial glide dislocation, which are named as the O-Zn-core, the B-Zn-core, the O-S-core, and the B-S-core, according to their geometrical feature and atomic ingredient at the core. For the 90° partial dislocation, the O-Zn-core (double-period core) and the B-S-core (single-period core) are stable. The Peierls barrier heights of the O-Zn-core and the B-S-core are about 0.03 eV/Å and 0.01 eV/Å, respectively. For the 30° partial dislocation, the O-Zn-core (double-period core) and the B-Zn-core (single-period core) are stable and their Peierls barrier heights are approximately the same as that of the O-Zn-core of the 90° partial dislocation. The Peierls stress related to the barrier height is about 800 MPa for the 90° partial dislocation with the B-S-core. The existence of unstable equilibrium cores enables us to introduce the concept of the partial kink. Based on the concept of the partial kink, a minimum energy path is proposed for the formation and migration of kinks. It is noticed that the step length in kink migration is doubled due to the core reconstruction." @default.
- W2900020984 created "2018-11-16" @default.
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- W2900020984 date "2018-11-06" @default.
- W2900020984 modified "2023-10-18" @default.
- W2900020984 title "A theoretical investigation of the glide dislocations in the sphalerite ZnS" @default.
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- W2900020984 doi "https://doi.org/10.1063/1.5050063" @default.
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