Model study of local enhancement of chemical potential gradient after facet formation on growing spherical Cu2−δSe crystals

Possible burst-like facet growth mode at high temperatures

“…1 in Ref. [27]). We note that the origin of the time axes has been set at the beginning of the recording of the interference pattern, and this moment has been taken as zero of the vertical facet displacement as well (t ¼ t 0 , z ¼ z 0 ).…”

“…the local supersaturation on the growing crystal surface [10]. By using a simple model of stationary diffusion of Cu atoms, injected at the centre of the spherical crystal, towards the crystal surface, we have shown that the concentration of Cu atoms beneath the facet, whose nucleation barrier prevents Cu atoms from forming a new layer, may cause the local chemical gradient Dm sst to acquire values that are high enough to penetrate the barrier [27]. On this basis we propose the following scenario of facet advancement.…”