Buoyancy and rotation in small-scale vertical Bridgman growth of cadmium zinc telluride using accelerated crucible rotation

Andrew Yeckel, Jeffrey J. Derby

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Theoretical simulations of vertical Bridgman growth of cadmium zinc telluride are performed to study the effects of the accelerated crucible rotation technique (ACRT). The results indicate that thermal buoyancy has a dramatic effect on the flow, even in a relatively small system at high rotation rate, contrary to assertions made in recent papers by Liu et al. (J. Crystal Growth 219 (2000) 22). We demonstrate their prior results greatly overstate the effectiveness of ACRT at promoting mixing. Contrary to conventional wisdom, the ACRT rotation cycle considered here for a small-scale growth system actually suppresses mixing in the melt near the ampoule wall, resulting in diffusion-limited mass transport there.

Original languageEnglish (US)
Pages (from-to)599-608
Number of pages10
JournalJournal of Crystal Growth
Volume233
Issue number3
DOIs
StatePublished - Dec 2001

Bibliographical note

Funding Information:
This work was supported in part by NASA, the Minnesota Supercomputing Institute, and the Army HPC Research Center under the auspices of the Department of the Army, Army Research Laboratory cooperative agreement DAAH04-95-2-0003/contract DAAH04-95-C-0008, the content of which does not necessarily reflect the position or policy of the government, and no official endorsement should be inferred.

Keywords

  • A1. computer simulation
  • A1. convection
  • A1. diffusion
  • A1. fluid flows
  • A2. accelerated crucible rotation technique
  • B2. semiconducting II-VI materials

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