Diffusion-controlled anisotropic growth of stable and metastable crystal polymorphs in the phase-field crystal model

G. Tegze, L. Gránásy, G. I. Tóth, F. Podmaniczky, A. Jaatinen, T. Ala-Nissila, T. Pusztai

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

We use a simple density functional approach on a diffusional time scale, to address freezing to the body-centered cubic (bcc), hexagonal close-packed (hcp), and face-centered cubic (fcc) structures. We observe faceted equilibrium shapes and diffusion-controlled layerwise crystal growth consistent with two-dimensional nucleation. The predicted growth anisotropies are discussed in relation with results from experiment and atomistic simulations. We also demonstrate that varying the lattice constant of a simple cubic substrate, one can tune the epitaxially growing body-centered tetragonal structure between bcc and fcc, and observe a Mullins-Sekerka-Asaro-Tiller-Grinfeld-type instability.

Original languageEnglish
Article number035702
JournalPhysical review letters
Volume103
Issue number3
DOIs
Publication statusPublished - Aug 6 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Diffusion-controlled anisotropic growth of stable and metastable crystal polymorphs in the phase-field crystal model'. Together they form a unique fingerprint.

  • Cite this