Abstract
Received 10 September 2007; published 15 October 2007In crystal growth of a dilute alloy from a melt, the way of spreading of solute atoms into the liquid and solidphases leads to a variety of dynamic instabilities of the crystal surface. In addition to the diffusion-inducedMullins-Sekerka instability, leading to dendritic structures, a couple of new instabilities is shown to appear dueto the segregation of solute atoms in the interface region. Each of these instabilities occurs within a velocitywindow, which, controlled by the system parameters, appears like a new phase in a nonequilibrium situation.DOI: 10.1103/PhysRevB.76.153405 PACS number s : 81.10.Aj, 68.35.Md, 05.70.Ln
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